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Transport in plants
Question Paper
Level IGCSE
Subject Biology
ExamBoard CambridgeInternationalExaminations
Unit 8–Transportin plants
Booklet QuestionPaper
Time Allowed: 47 minutes
Score: /39
Percentage: /100
1 Which graph shows most clearly what will happen to the rate of transpiration as humidity
increases?
humidity
A
rate of
transpiration
rate of
transpiration
rate of
transpiration
rate of
transpiration
humidity
B
humidity
C
humidity
D
2 The diagram shows a potted plant and the same plant 24 hours later.
24 hours
What causes the change in the appearance of the plant?
A Water loss is greater than water uptake.
B Water moves from the leaves to the stem.
C Water uptake is equal to water loss.
D Water uptake is greater than water loss.
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3 By which process is water lost from a leaf?
A active transport
B diffusion
C osmosis
D photosynthesis
4 The lower end of a plant stem is placed in water coloured with red dye. After three hours, the
stem is cut as shown in the diagram.
Which labelled region is stained red?
D
A
B
C
5 What is transported in the phloem and what is the direction of transport?
A starch, up and down
B starch, up only
C sucrose, down and up
D sucrose, down only
6 In which order does water pass through the cells of a plant, as the water travels from the roots to
a leaf?
A mesophyll cells β†’ root hair β†’ root cortex β†’ xylem
B root cortex β†’ root hair β†’ xylem β†’ mesophyll cells
C root hair β†’ mesophyll cells β†’ root cortex β†’ xylem
D root hair β†’ root cortex β†’ xylem β†’ mesophyll cells
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7 The diagram shows a plant shoot and the same shoot six hours later.
plant shoot same shoot six hours later
Which change in environmental conditions could cause this change in the shoot?
A a decrease in available water
B a decrease in light intensity
C a decrease in wind speed
D an increase in humidity
8 A celery stalk is placed in a beaker of blue dye. Once the dye reaches the leaves, the stalk is
taken out and cut in half.
celery stalk
blue dye
cut
Which diagram shows the appearance of the cut end of the stalk?
A B C D
blue dye blue dye blue dye
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9 The diagram shows a cross-section through a plant root.
Q
Q shows the part that is stained red when the root is placed in water containing a red dye.
What is found at Q?
A guard cells
B palisade cells
C phloem
D xylem
10 Which processes produce a continuous space for the flow of water in xylem vessels?
11 Some liquid is collected from the xylem in the stem of a plant.
What is present in the liquid?
A cellulose
B inorganic ions
C starch
D sugar
12 What is a function of phloem?
A translocation
B transpiration
C storage of food
D support
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13 The diagram shows part of the trunk of a small tree with a ring of bark removed. Removing the
ring of bark takes away phloem but leaves the xylem intact.
xylem
phloem
upper
branch
lower
branch
ring of bark
removed here
What effect will removing the bark have on the two branches?
14 The table shows some characteristics of four different plants.
The plants are growing in the same environmental conditions.
Which plant will have the highest rate of transpiration?
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15 A decrease in which factor normally causes transpiration rate to increase?
A humidity
B light intensity
C stomatal opening
D temperature
16 What is the path of water through a plant?
A cortex cells β†’ xylem β†’ stomata β†’ roots
B root hair β†’ xylem β†’ mesophyll cells β†’ stomata
C roots β†’ cortex cells β†’ stomata β†’ phloem
D roots β†’ root hair β†’ stomata β†’ xylem
17 In which order does water pass through these tissues in a plant?
A mesophyll β†’ xylem β†’ root cortex
B root cortex β†’ mesophyll β†’ xylem
C root cortex β†’ xylem β†’ mesophyll
D xylem β†’ mesophyll β†’ root cortex
18 The diagram shows two shoots at the start of an experiment on transpiration.
30g
spring balance
oil
water
shoot X shoot Y
30g
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What are the likely readings on the spring balances after three days?
shoot X shoot Y
A 30g 30 g
B 30g 25 g
C 25g 30 g
D 25g 25 g
19 Which statements about plant transpiration are correct?
plants transpire most when plants transpire least when
A
B
C
D
air is dry
light intensity is high
light intensity is low
temperature is cold
temperature is high
air is humid
temperature is low
light intensity is high
20 The table shows the rate of water flow through a tree over a 12 hour period.
What conclusion can be drawn from the table?
A Between 7:00 and 17:00 hours the rate of flow continuously increases.
B The greatest increase in rate of flow in a two-hour period is between 11:00 and 13:00 hours.
C Water does not flow up through a tree at night.
D Water flow is affected by humidity.
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21 Which words correctly complete the following sentence?
β€˜Transpiration is the ……1…… of water at the surface of the ……2…… cells followed by the
……3…… of water vapour from the plant ……4…… .’
22 What could increase the rate of water uptake by a shoot?
A covering the shoot with a black plastic bag
B covering the shoot with a clear plastic bag
C removing the leaves from the shoot
D shining a bright light onto the shoot
23 The diagram shows how water is lost from a leaf.
water vapour
By which process is the water lost?
A osmosis
B photosynthesis
C translocation
D transpiration
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24 The diagram shows a cross-section through a plant stem.
Q
Q shows the part that is stained red when the stem is placed in water containing a red dye.
What is found at Q?
A guard cells
B palisade cells
C phloem
D xylem
25 The graph shows how the rate of transpiration is affected by X.
rate of
transpiration
X
What is X?
A humidity
B light intensity
C soil moisture
D temperature
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26 In what form does a plant absorb and lose water?
27 In which order does water pass through these structures in a plant?
A mesophyll β†’ root hair β†’ xylem
B mesophyll β†’ xylem β†’ root hair
C root hair β†’ mesophyll β†’ xylem
D root hair β†’ xylem β†’ mesophyll
28 Which two substances are transported in the phloem?
A amino acids and protein
B amino acids and sucrose
C protein and starch
D starch and sucrose
29 What is a description of transpiration?
A exchange of gases between the leaf and the atmosphere
B loss of water vapour from the leaves and stems of a plant
C movement of water from the roots to the leaves
D movement of water through the cells of the leaf
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30 The diagram shows the stem of a plant. A strip of the outer tissue including the phloem has been
removed.
xylem
phloem
How is transport in the plant affected?
A Amino acids and sucrose cannot pass to the roots.
B Dissolved salts cannot pass to the leaves.
C Water cannot pass to the leaves.
D Water cannot pass to the roots.
31 The diagram shows a plant.
W
X
Y
Z
What is the pathway taken by most of the water absorbed by this plant?
A X β†’ Y β†’ Z
B W β†’ Y β†’ Z
C Z β†’ Y β†’ X
D Z β†’ Y β†’ W
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32 The diagrams show stages in the passage of water through a plant.
The circles are the starting points for arrows to show the direction in which the water moves.
Which circle must have an arrow pointing downwards only?
C
D
A
B
33 Translocation occurs in phloem tubes. Aphids feed on the contents of phloem tubes.
What type of food would be lacking in their diet?
A amino acid
B fat
C sucrose
D water
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34 Which two functions does xylem perform?
absorption conduction contraction support
A    
B    
key
= performs
C     = does not perform
D    
35 The diagram shows cells from a storage organ of a flowering plant after they have been stained
with iodine solution.
X
Structures X stain black.
What does this show that structures X contain?
A chlorophyll
B fat
C starch
D sugar
36 What shows the correct translocation of carbohydrate in a potato plant that is growing in bright
sunlight?
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37 Which conditions of humidity, light intensity and temperature make transpiration slowest?
38 The diagram shows how the appearance of a potted plant changes over a period of four days.
Which environmental conditions are most likely to cause this change?
39 The table shows four substances and the parts of the plant to which they are transported.
substance part of plant
1 flower buds
2 leaf cells
3 root cells
amino acids
carbon dioxide
sucrose
water4 stomata
Which are examples of translocation?
A 11 an1 a B 1 and 3 C 2 and 4 D 3 and 4
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  • 1. Save My Exams!– The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ Transport in plants Question Paper Level IGCSE Subject Biology ExamBoard CambridgeInternationalExaminations Unit 8–Transportin plants Booklet QuestionPaper Time Allowed: 47 minutes Score: /39 Percentage: /100
  • 2. 1 Which graph shows most clearly what will happen to the rate of transpiration as humidity increases? humidity A rate of transpiration rate of transpiration rate of transpiration rate of transpiration humidity B humidity C humidity D 2 The diagram shows a potted plant and the same plant 24 hours later. 24 hours What causes the change in the appearance of the plant? A Water loss is greater than water uptake. B Water moves from the leaves to the stem. C Water uptake is equal to water loss. D Water uptake is greater than water loss. Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 3. 3 By which process is water lost from a leaf? A active transport B diffusion C osmosis D photosynthesis 4 The lower end of a plant stem is placed in water coloured with red dye. After three hours, the stem is cut as shown in the diagram. Which labelled region is stained red? D A B C 5 What is transported in the phloem and what is the direction of transport? A starch, up and down B starch, up only C sucrose, down and up D sucrose, down only 6 In which order does water pass through the cells of a plant, as the water travels from the roots to a leaf? A mesophyll cells β†’ root hair β†’ root cortex β†’ xylem B root cortex β†’ root hair β†’ xylem β†’ mesophyll cells C root hair β†’ mesophyll cells β†’ root cortex β†’ xylem D root hair β†’ root cortex β†’ xylem β†’ mesophyll cells Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 4. 7 The diagram shows a plant shoot and the same shoot six hours later. plant shoot same shoot six hours later Which change in environmental conditions could cause this change in the shoot? A a decrease in available water B a decrease in light intensity C a decrease in wind speed D an increase in humidity 8 A celery stalk is placed in a beaker of blue dye. Once the dye reaches the leaves, the stalk is taken out and cut in half. celery stalk blue dye cut Which diagram shows the appearance of the cut end of the stalk? A B C D blue dye blue dye blue dye Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 5. 9 The diagram shows a cross-section through a plant root. Q Q shows the part that is stained red when the root is placed in water containing a red dye. What is found at Q? A guard cells B palisade cells C phloem D xylem 10 Which processes produce a continuous space for the flow of water in xylem vessels? 11 Some liquid is collected from the xylem in the stem of a plant. What is present in the liquid? A cellulose B inorganic ions C starch D sugar 12 What is a function of phloem? A translocation B transpiration C storage of food D support Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 6. 13 The diagram shows part of the trunk of a small tree with a ring of bark removed. Removing the ring of bark takes away phloem but leaves the xylem intact. xylem phloem upper branch lower branch ring of bark removed here What effect will removing the bark have on the two branches? 14 The table shows some characteristics of four different plants. The plants are growing in the same environmental conditions. Which plant will have the highest rate of transpiration? Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 7. 15 A decrease in which factor normally causes transpiration rate to increase? A humidity B light intensity C stomatal opening D temperature 16 What is the path of water through a plant? A cortex cells β†’ xylem β†’ stomata β†’ roots B root hair β†’ xylem β†’ mesophyll cells β†’ stomata C roots β†’ cortex cells β†’ stomata β†’ phloem D roots β†’ root hair β†’ stomata β†’ xylem 17 In which order does water pass through these tissues in a plant? A mesophyll β†’ xylem β†’ root cortex B root cortex β†’ mesophyll β†’ xylem C root cortex β†’ xylem β†’ mesophyll D xylem β†’ mesophyll β†’ root cortex 18 The diagram shows two shoots at the start of an experiment on transpiration. 30g spring balance oil water shoot X shoot Y 30g Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 8. What are the likely readings on the spring balances after three days? shoot X shoot Y A 30g 30 g B 30g 25 g C 25g 30 g D 25g 25 g 19 Which statements about plant transpiration are correct? plants transpire most when plants transpire least when A B C D air is dry light intensity is high light intensity is low temperature is cold temperature is high air is humid temperature is low light intensity is high 20 The table shows the rate of water flow through a tree over a 12 hour period. What conclusion can be drawn from the table? A Between 7:00 and 17:00 hours the rate of flow continuously increases. B The greatest increase in rate of flow in a two-hour period is between 11:00 and 13:00 hours. C Water does not flow up through a tree at night. D Water flow is affected by humidity. Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 9. 21 Which words correctly complete the following sentence? β€˜Transpiration is the ……1…… of water at the surface of the ……2…… cells followed by the ……3…… of water vapour from the plant ……4…… .’ 22 What could increase the rate of water uptake by a shoot? A covering the shoot with a black plastic bag B covering the shoot with a clear plastic bag C removing the leaves from the shoot D shining a bright light onto the shoot 23 The diagram shows how water is lost from a leaf. water vapour By which process is the water lost? A osmosis B photosynthesis C translocation D transpiration Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 10. 24 The diagram shows a cross-section through a plant stem. Q Q shows the part that is stained red when the stem is placed in water containing a red dye. What is found at Q? A guard cells B palisade cells C phloem D xylem 25 The graph shows how the rate of transpiration is affected by X. rate of transpiration X What is X? A humidity B light intensity C soil moisture D temperature Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 11. 26 In what form does a plant absorb and lose water? 27 In which order does water pass through these structures in a plant? A mesophyll β†’ root hair β†’ xylem B mesophyll β†’ xylem β†’ root hair C root hair β†’ mesophyll β†’ xylem D root hair β†’ xylem β†’ mesophyll 28 Which two substances are transported in the phloem? A amino acids and protein B amino acids and sucrose C protein and starch D starch and sucrose 29 What is a description of transpiration? A exchange of gases between the leaf and the atmosphere B loss of water vapour from the leaves and stems of a plant C movement of water from the roots to the leaves D movement of water through the cells of the leaf Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 12. 30 The diagram shows the stem of a plant. A strip of the outer tissue including the phloem has been removed. xylem phloem How is transport in the plant affected? A Amino acids and sucrose cannot pass to the roots. B Dissolved salts cannot pass to the leaves. C Water cannot pass to the leaves. D Water cannot pass to the roots. 31 The diagram shows a plant. W X Y Z What is the pathway taken by most of the water absorbed by this plant? A X β†’ Y β†’ Z B W β†’ Y β†’ Z C Z β†’ Y β†’ X D Z β†’ Y β†’ W Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 13. 32 The diagrams show stages in the passage of water through a plant. The circles are the starting points for arrows to show the direction in which the water moves. Which circle must have an arrow pointing downwards only? C D A B 33 Translocation occurs in phloem tubes. Aphids feed on the contents of phloem tubes. What type of food would be lacking in their diet? A amino acid B fat C sucrose D water Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 14. 34 Which two functions does xylem perform? absorption conduction contraction support A B key = performs C = does not perform D 35 The diagram shows cells from a storage organ of a flowering plant after they have been stained with iodine solution. X Structures X stain black. What does this show that structures X contain? A chlorophyll B fat C starch D sugar 36 What shows the correct translocation of carbohydrate in a potato plant that is growing in bright sunlight? Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
  • 15. 37 Which conditions of humidity, light intensity and temperature make transpiration slowest? 38 The diagram shows how the appearance of a potted plant changes over a period of four days. Which environmental conditions are most likely to cause this change? 39 The table shows four substances and the parts of the plant to which they are transported. substance part of plant 1 flower buds 2 leaf cells 3 root cells amino acids carbon dioxide sucrose water4 stomata Which are examples of translocation? A 11 an1 a B 1 and 3 C 2 and 4 D 3 and 4 Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/