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This document consists of 20 printed pages. DC (NF/SW) 99331/3 © UCLES 2015 [Turn over Cambridge International Examinations Cambridge International General Certificate of Secondary Education *7452733535* BIOLOGY 0610/32 Paper 3 Extended May/June 2015 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.
2 0610/32/M/J/15© UCLES 2015 1 (a) Fig. 1.1 shows seven plant species that are important crops. A B C D F G E not drawn to scale Fig. 1.1
3 0610/32/M/J/15© UCLES 2015 [Turn over Use the key to identify each species. Write the letter of each species (A to G) in the correct box beside the key. One has been done for you. Key 1 (a) branched veins on leaves go to 2 (b) parallel veins (not branched) on leaves go to 3 2 (a) leaves divided into leaflets (look like small individual leaves) go to 4 (b) leaves not divided into leaflets go to 5 3 (a) flowers grouped tightly together at the top of the stalk Triticum aestivum (b) flowers grouped loosely together at the top of the stalk go to 6 4 (a) large flowers located at top of stem Solanum tuberosum (b) small flowers located along the stem Glycine max 5 (a) leaves have five lobes Manihot esculenta F (b) leaves have three lobes Ipomoea batatas 6 (a) flowers above youngest leaf Zea mays (b) flowers bend down below youngest leaf Oryza sativa [3] (b) The pattern of the veins on the leaves was used in the key to separate the monocotyledonous crop plants and eudicotyledonous (dicotyledonous) crop plants shown in Fig. 1.1. State one other feature that could be used to identify monocotyledonous plants from eudicotyledonous plants. .............................................................................................................................................. [1]
4 0610/32/M/J/15© UCLES 2015 (c) The leaves of some crop plants are not eaten but are used to make paper. This reduces deforestation because fewer trees are cut down for making paper. Deforestation has negative effects on soil ecosystems. (i) Describe the negative effects of deforestation on soil ecosystems. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [4] (ii) Paper recycling can reduce deforestation. Outline how paper can be recycled. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] [Total: 11]
5 0610/32/M/J/15© UCLES 2015 [Turn over 2 (a) Write a balanced chemical equation for photosynthesis. ................................................................... ................................................................... [3] A student investigated the effect of light intensity on the rate of photosynthesis of algae. Fig. 2.1 shows the apparatus set up for the investigation. 0 20 40 60 80 100 120 glass tank with water bottle containing algae suspension and hydrogencarbonate indicator solutionlamp ruler stop-clock Fig. 2.1 (b) Suggest why a glass tank with water was placed between the lamp and the bottle in the investigation. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [1] (c) The hydrogencarbonate indicator solution changes colour when the pH changes. At pH 8.4 it is red, at pH 7.6 it is yellow and at pH 9 it is purple. Predict the colour of the hydrogencarbonate indicator solution in the bottle nearest the lamp at the end of the investigation. Explain your answer. colour prediction ....................................................................................................................... explanation ............................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... [3]
6 0610/32/M/J/15© UCLES 2015 (d) The student’s results are shown in Fig. 2.2. 100 90 80 70 60 50 40 30 20 10 0 0 20 40 60 80 distance from lamp/cm time for colour change /minutes 100 120 140 Fig. 2.2 Describe and explain how the rate of photosynthesis is affected by light intensity. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [5] [Total: 12]
7 0610/32/M/J/15© UCLES 2015 [Turn over 3 Fig. 3.1 shows images of red blood cells from a human, A, and a bird, B. nucleus BA Fig. 3.1 (a) State the function of red blood cells. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [1] (b) There is a nucleus present in each of the red blood cells of the bird, as shown in Fig. 3.1. (i) State the function of a nucleus. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1] (ii) Human red blood cells do not contain a nucleus. State an advantage of this. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1]
8 0610/32/M/J/15© UCLES 2015 Red blood cells from humans were placed into three test-tubes. Each test-tube contained a salt solution of a different concentration. A sample was taken from each test-tube and viewed using a microscope. The results are shown in Fig. 3.2. 0.10salt concentration/moldm–3 0.15 0.20 0.25 Fig. 3.2 (c) (i) Describe the appearance of the red blood cells in the 0.15moldm−3 salt solution and the red blood cells in the 0.20moldm−3 salt solution. 0.15moldm−3 ..................................................................................................................... ........................................................................................................................................... 0.20moldm−3 ..................................................................................................................... ........................................................................................................................................... [2] (ii) The red blood cells in the 0.10moldm−3 salt solution burst. Explain why the red blood cells burst. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] (iii) Suggest why a plant cell in 0.10moldm−3 salt solution would not burst. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1]
9 0610/32/M/J/15© UCLES 2015 [Turn over (d) Some people in accidents lose a lot of blood. Doctors give patients fluid to replace lost blood. (i) Use the information in Fig.3.2 to predict and explain the concentration of fluid replacement given to patients who have lost blood. prediction ........................................................................................................................... explanation ........................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... [2] (ii) Describe the process of blood clotting. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] [Total: 14]
10 0610/32/M/J/15© UCLES 2015 4 Fig. 4.1 shows part of the human gas exchange system. K L Fig. 4.1 (a) (i) Name structure K. ...................................................................................................................................... [1] (ii) Ciliated cells and goblet cells line structure L. Explain the function of these cells in structure L. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3]
11 0610/32/M/J/15© UCLES 2015 [Turn over (b) Gas exchange occurs at the alveoli. (i) Describe how oxygen molecules move from the alveoli into the blood. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] (ii) During inspiration, air moves from the atmosphere into the lungs. Describe the mechanism of inspiration. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [4] (iii) Name one gas that is found in a higher concentration in expired air than in inspired air. ...................................................................................................................................... [1]
12 0610/32/M/J/15© UCLES 2015 (c) Tobacco smoke affects the gas exchange system. Name two components of tobacco smoke and describe their effect on the gas exchange system. component 1 ............................................................................................................................. effect ......................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... component 2 ............................................................................................................................. effect ......................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... [4] [Total: 16]
13 0610/32/M/J/15© UCLES 2015 [Turn over Question 5 begins on page 14.
14 0610/32/M/J/15© UCLES 2015 5 The growth and development of an embryo begins immediately after fertilisation. (a) Fig. 5.1 shows some of the events (S to Y) between fertilisation and birth. S development of the heart T placenta forms U hormones are released by mother to start contractions V implantation of the embryo in the lining of the uterus W embryo forms into a ball of eight cells X development of sex organs Y fertilised ovum divides into two cells by mitosis Fig. 5.1 (i) Put the events into the correct sequence. Two have been done for you. Y X [2] Fig. 5.2 shows a developing fetus and part of the reproductive system of the mother. M N O R Q P Fig. 5.2
15 0610/32/M/J/15© UCLES 2015 [Turn over (ii) Table 5.1 shows some functions and names of parts of the developing fetus and pregnant mother. Complete the table. One row has been done for you. Table 5.1 letter from Fig. 5.2 name function during pregnancy P amniotic sac encloses the amniotic fluid attaches the placenta to the fetus amniotic fluid contracts to push the baby through the birth canal placenta widens during labour to allow the head of the baby to pass [5]
16 0610/32/M/J/15© UCLES 2015 (b) Mothers are often given nutritional advice for their newborn babies. Scientists compared breast-feeding to bottle-feeding with formula milk. Their data is shown in Table 5.2. Table 5.2 breast milk formula milk lipid/g per dm3 37 38 lactose/g per dm3 73 72 protein/g per dm3 8.7 12.9 energy/kJ per dm3 680 690 volume of milk taken/g per day 448 732 Use the data in Table 5.2 to describe one difference and one similarity between the nutritional value of breast milk and formula milk. difference .................................................................................................................................. ................................................................................................................................................... similarity .................................................................................................................................... ................................................................................................................................................... [2]
17 0610/32/M/J/15© UCLES 2015 [Turn over (c) The scientists measured the growth of the babies fed with breast milk and babies fed with formula milk described in Table 5.2. The mass of the babies from birth until they were 15 months old is shown in Fig. 5.3. 0 0 mass/kg age/months 2 2 4 6 8 10 12 4 6 8 10 12 14 16 breast-fed Key formula-fed Fig. 5.3 (i) Define the term growth. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [2] (ii) Using the information in Table 5.2 and Fig. 5.3, describe and explain the changes in the mass of the babies that were breast-fed and babies that were bottle-fed with formula milk. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [4]
18 0610/32/M/J/15© UCLES 2015 (iii) The scientists noticed that there were other differences between the breast-fed babies and the babies fed with formula milk. Describe the advantages and disadvantages of breast-feeding. advantages ........................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... disadvantages ................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... [4] [Total: 19]
19 0610/32/M/J/15© UCLES 2015 [Turn over 6 The human population is growing rapidly. This is increasing the pressure on the world food supply. (a) Name the rapid growth phase of any population of organisms. .............................................................................................................................................. [1] In Canada farmers are breeding fish in large nets because the wild stocks of fish are decreasing. Fig. 6.1 is a diagram of a salmon fish farm in the ocean. The salmon only eat the food provided by the worker. worker feeds salmon with fish pieces from floating walkway fish farmer monitors water from boat waste excreted from salmon collects at the bottom of the ocean net excess fish pieces pass into the ocean ocean floor Fig. 6.1 (b) Explain the effects of the excess fish pieces and waste excreted from the salmon on the environment. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [3]
20 0610/32/M/J/15© UCLES 2015 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. (c) State the lowest possible trophic level of the salmon shown in Fig. 6.1. .............................................................................................................................................. [1] (d) Other farmers grow seaweed. Salmon farming is a less energy efficient way of producing food for humans than seaweed farming. Explain why. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [3] [Total: 8]

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0610 s15 qp_32

  • 1. This document consists of 20 printed pages. DC (NF/SW) 99331/3 © UCLES 2015 [Turn over Cambridge International Examinations Cambridge International General Certificate of Secondary Education *7452733535* BIOLOGY 0610/32 Paper 3 Extended May/June 2015 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.
  • 2. 2 0610/32/M/J/15© UCLES 2015 1 (a) Fig. 1.1 shows seven plant species that are important crops. A B C D F G E not drawn to scale Fig. 1.1
  • 3. 3 0610/32/M/J/15© UCLES 2015 [Turn over Use the key to identify each species. Write the letter of each species (A to G) in the correct box beside the key. One has been done for you. Key 1 (a) branched veins on leaves go to 2 (b) parallel veins (not branched) on leaves go to 3 2 (a) leaves divided into leaflets (look like small individual leaves) go to 4 (b) leaves not divided into leaflets go to 5 3 (a) flowers grouped tightly together at the top of the stalk Triticum aestivum (b) flowers grouped loosely together at the top of the stalk go to 6 4 (a) large flowers located at top of stem Solanum tuberosum (b) small flowers located along the stem Glycine max 5 (a) leaves have five lobes Manihot esculenta F (b) leaves have three lobes Ipomoea batatas 6 (a) flowers above youngest leaf Zea mays (b) flowers bend down below youngest leaf Oryza sativa [3] (b) The pattern of the veins on the leaves was used in the key to separate the monocotyledonous crop plants and eudicotyledonous (dicotyledonous) crop plants shown in Fig. 1.1. State one other feature that could be used to identify monocotyledonous plants from eudicotyledonous plants. .............................................................................................................................................. [1]
  • 4. 4 0610/32/M/J/15© UCLES 2015 (c) The leaves of some crop plants are not eaten but are used to make paper. This reduces deforestation because fewer trees are cut down for making paper. Deforestation has negative effects on soil ecosystems. (i) Describe the negative effects of deforestation on soil ecosystems. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [4] (ii) Paper recycling can reduce deforestation. Outline how paper can be recycled. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] [Total: 11]
  • 5. 5 0610/32/M/J/15© UCLES 2015 [Turn over 2 (a) Write a balanced chemical equation for photosynthesis. ................................................................... ................................................................... [3] A student investigated the effect of light intensity on the rate of photosynthesis of algae. Fig. 2.1 shows the apparatus set up for the investigation. 0 20 40 60 80 100 120 glass tank with water bottle containing algae suspension and hydrogencarbonate indicator solutionlamp ruler stop-clock Fig. 2.1 (b) Suggest why a glass tank with water was placed between the lamp and the bottle in the investigation. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [1] (c) The hydrogencarbonate indicator solution changes colour when the pH changes. At pH 8.4 it is red, at pH 7.6 it is yellow and at pH 9 it is purple. Predict the colour of the hydrogencarbonate indicator solution in the bottle nearest the lamp at the end of the investigation. Explain your answer. colour prediction ....................................................................................................................... explanation ............................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... [3]
  • 6. 6 0610/32/M/J/15© UCLES 2015 (d) The student’s results are shown in Fig. 2.2. 100 90 80 70 60 50 40 30 20 10 0 0 20 40 60 80 distance from lamp/cm time for colour change /minutes 100 120 140 Fig. 2.2 Describe and explain how the rate of photosynthesis is affected by light intensity. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [5] [Total: 12]
  • 7. 7 0610/32/M/J/15© UCLES 2015 [Turn over 3 Fig. 3.1 shows images of red blood cells from a human, A, and a bird, B. nucleus BA Fig. 3.1 (a) State the function of red blood cells. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [1] (b) There is a nucleus present in each of the red blood cells of the bird, as shown in Fig. 3.1. (i) State the function of a nucleus. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1] (ii) Human red blood cells do not contain a nucleus. State an advantage of this. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1]
  • 8. 8 0610/32/M/J/15© UCLES 2015 Red blood cells from humans were placed into three test-tubes. Each test-tube contained a salt solution of a different concentration. A sample was taken from each test-tube and viewed using a microscope. The results are shown in Fig. 3.2. 0.10salt concentration/moldm–3 0.15 0.20 0.25 Fig. 3.2 (c) (i) Describe the appearance of the red blood cells in the 0.15moldm−3 salt solution and the red blood cells in the 0.20moldm−3 salt solution. 0.15moldm−3 ..................................................................................................................... ........................................................................................................................................... 0.20moldm−3 ..................................................................................................................... ........................................................................................................................................... [2] (ii) The red blood cells in the 0.10moldm−3 salt solution burst. Explain why the red blood cells burst. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] (iii) Suggest why a plant cell in 0.10moldm−3 salt solution would not burst. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1]
  • 9. 9 0610/32/M/J/15© UCLES 2015 [Turn over (d) Some people in accidents lose a lot of blood. Doctors give patients fluid to replace lost blood. (i) Use the information in Fig.3.2 to predict and explain the concentration of fluid replacement given to patients who have lost blood. prediction ........................................................................................................................... explanation ........................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... [2] (ii) Describe the process of blood clotting. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] [Total: 14]
  • 10. 10 0610/32/M/J/15© UCLES 2015 4 Fig. 4.1 shows part of the human gas exchange system. K L Fig. 4.1 (a) (i) Name structure K. ...................................................................................................................................... [1] (ii) Ciliated cells and goblet cells line structure L. Explain the function of these cells in structure L. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3]
  • 11. 11 0610/32/M/J/15© UCLES 2015 [Turn over (b) Gas exchange occurs at the alveoli. (i) Describe how oxygen molecules move from the alveoli into the blood. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] (ii) During inspiration, air moves from the atmosphere into the lungs. Describe the mechanism of inspiration. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [4] (iii) Name one gas that is found in a higher concentration in expired air than in inspired air. ...................................................................................................................................... [1]
  • 12. 12 0610/32/M/J/15© UCLES 2015 (c) Tobacco smoke affects the gas exchange system. Name two components of tobacco smoke and describe their effect on the gas exchange system. component 1 ............................................................................................................................. effect ......................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... component 2 ............................................................................................................................. effect ......................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... [4] [Total: 16]
  • 13. 13 0610/32/M/J/15© UCLES 2015 [Turn over Question 5 begins on page 14.
  • 14. 14 0610/32/M/J/15© UCLES 2015 5 The growth and development of an embryo begins immediately after fertilisation. (a) Fig. 5.1 shows some of the events (S to Y) between fertilisation and birth. S development of the heart T placenta forms U hormones are released by mother to start contractions V implantation of the embryo in the lining of the uterus W embryo forms into a ball of eight cells X development of sex organs Y fertilised ovum divides into two cells by mitosis Fig. 5.1 (i) Put the events into the correct sequence. Two have been done for you. Y X [2] Fig. 5.2 shows a developing fetus and part of the reproductive system of the mother. M N O R Q P Fig. 5.2
  • 15. 15 0610/32/M/J/15© UCLES 2015 [Turn over (ii) Table 5.1 shows some functions and names of parts of the developing fetus and pregnant mother. Complete the table. One row has been done for you. Table 5.1 letter from Fig. 5.2 name function during pregnancy P amniotic sac encloses the amniotic fluid attaches the placenta to the fetus amniotic fluid contracts to push the baby through the birth canal placenta widens during labour to allow the head of the baby to pass [5]
  • 16. 16 0610/32/M/J/15© UCLES 2015 (b) Mothers are often given nutritional advice for their newborn babies. Scientists compared breast-feeding to bottle-feeding with formula milk. Their data is shown in Table 5.2. Table 5.2 breast milk formula milk lipid/g per dm3 37 38 lactose/g per dm3 73 72 protein/g per dm3 8.7 12.9 energy/kJ per dm3 680 690 volume of milk taken/g per day 448 732 Use the data in Table 5.2 to describe one difference and one similarity between the nutritional value of breast milk and formula milk. difference .................................................................................................................................. ................................................................................................................................................... similarity .................................................................................................................................... ................................................................................................................................................... [2]
  • 17. 17 0610/32/M/J/15© UCLES 2015 [Turn over (c) The scientists measured the growth of the babies fed with breast milk and babies fed with formula milk described in Table 5.2. The mass of the babies from birth until they were 15 months old is shown in Fig. 5.3. 0 0 mass/kg age/months 2 2 4 6 8 10 12 4 6 8 10 12 14 16 breast-fed Key formula-fed Fig. 5.3 (i) Define the term growth. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [2] (ii) Using the information in Table 5.2 and Fig. 5.3, describe and explain the changes in the mass of the babies that were breast-fed and babies that were bottle-fed with formula milk. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [4]
  • 18. 18 0610/32/M/J/15© UCLES 2015 (iii) The scientists noticed that there were other differences between the breast-fed babies and the babies fed with formula milk. Describe the advantages and disadvantages of breast-feeding. advantages ........................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... disadvantages ................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... [4] [Total: 19]
  • 19. 19 0610/32/M/J/15© UCLES 2015 [Turn over 6 The human population is growing rapidly. This is increasing the pressure on the world food supply. (a) Name the rapid growth phase of any population of organisms. .............................................................................................................................................. [1] In Canada farmers are breeding fish in large nets because the wild stocks of fish are decreasing. Fig. 6.1 is a diagram of a salmon fish farm in the ocean. The salmon only eat the food provided by the worker. worker feeds salmon with fish pieces from floating walkway fish farmer monitors water from boat waste excreted from salmon collects at the bottom of the ocean net excess fish pieces pass into the ocean ocean floor Fig. 6.1 (b) Explain the effects of the excess fish pieces and waste excreted from the salmon on the environment. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [3]
  • 20. 20 0610/32/M/J/15© UCLES 2015 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. (c) State the lowest possible trophic level of the salmon shown in Fig. 6.1. .............................................................................................................................................. [1] (d) Other farmers grow seaweed. Salmon farming is a less energy efficient way of producing food for humans than seaweed farming. Explain why. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [3] [Total: 8]