Cbse class 10 science chapter 9 heredity and evolution2015 11-09

GradeHop Practice Test Series -
CBSE Class 10 Science Chapter 9 Heredity and Evolution
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1) Identify true or false in the below sentences
A. Inheritance from the previous generation provides both a common basic body
design, and subtle changes in it, for the next generation.
B. Traits in one individual may be inherited together, giving rise to new
combinations of traits in the offspring of sexual reproduction.
1. Both A and B are false.
2. Both A and B are true.
3. Only A is true.
4. Only B is true.
A. Darwin s theory of evolution tells us how Germ cells evolved from simple
to more complex forms.
B. The more characteristics two species will have in common, the more diverse
they are.
3. Only A is true.
4. Only B is true.
A. Frequency of certain genes in a population remain same over generations.
B. Speciation may take place with geographical isolation.
3. Only A is true.
4. Only B is true.
A. In sexual reproduction minor diversity will be generated.
B. Changes in the non-reproductive tissues caused by environmental factors
are inheritable.
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3. Only A is true.
4. Only B is true.
B. If the copies are identical, the trait that gets expressed is called the
dominant trait and the other is called the recessive trait.
3. Only A is true.
4. Only B is true.
6) Identify all true sentences from the following
1. Selection of variants by environmental factors forms the basis for
evolutionary processes.
2. Frequency of certain genes in a population remain same over generations.
3. In some animals, the temperature and location at which fertilised eggs
are kept determines whether the animals developing in the eggs will be male
or female.
4. If one bacterium divides, generated bacterium will have small
inaccuracies in DNA copying.
2. Sometimes genetic drift provides diversity with adaptations.
3. Change in nonproductive tissues can not be passed on to the DNA of the
germ cells.
1. Sexually reproducing individuals have one genes for the one trait.
4. Women have a perfect pair of sex chromosomes, both called Y. Men have a
mismatched pair in which one is a normal-sized Y while the other is a short
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one called X.
2. Variations arising during the process of reproduction can not be
inherited.
2. Darwin s theory of evolution tells us how Germ cells evolved from simple
3. The similarity in gene frequency is due to natural selection.
11) Fill in the blank in the below sentence
Plants have hormones that can ___________ ___________.
1. trigger, outcome
2. trigger, reliably
3. trigger, growth
4. trigger, gene
Mendel used contrasting visible characters of garden peas like ___________
___________, tall ___________, white flowers.
1. reliably, temperature, process
2. round, temperature, mother
3. round, temperature, Plants
4. round, seeds, plants
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Mendel used contrasting visible characters of garden peas like ___________
___________, tall plants, white flowers.
1. round, male
2. round, making
3. round, eggs
4. round, seeds
A. Genes control characteristics, or traits.
B. Mendel used contrasting visible characters of garden peas like round
seeds, tall plants, white flowers.
3. Only A is true.
4. Only B is true.
Both the father and the mother contribute practically ___________ amounts of
genetic ___________ to the child.
1. information, design
2. equal, inherited
3. equal, called
4. equal, material
2. The outcome of the reproductive process remains the generation of
individuals of different design.
3. Mendel used contrasting visible characters of garden peas like round
4. Plants have hormones that can trigger growth.
1. Most human chromosomes have a maternal and a paternal copy, and we have
23 such pairs.
2. In some animals, the temperature at which fertilised eggs are kept
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determines whether the animals developing in the eggs will be male or female.
3. Genes control characteristics, or traits.
4. Cellular DNA is the information source for making gene in the cell.
1. The rules of geographical isolation determine the process by which
traits and characteristics are reliably inherited.
individuals of similar design.
3. Cellular DNA is the information source for making proteins in the cell.
23 such pairs.
1. Cellular DNA is the information source for making proteins in the cell.
2. Mendel used contrasting visible characters of garden peas like round
3. Mendel used contrasting visible characters of garden peas like wrinkled
seeds, short plants, violet flowers.
4. The similarity in gene frequncy is due to natural selection.
1. In some animals, the temperature and location at which fertilised eggs
are kept determines whether the animals developing in the eggs will be male
or female.
2. The rules of heredity determine the process by which traits and
characteristics are reliably inherited.
3. A section of DNA that provides information for one protein is called the
gene for that DNA.
4. Plants have hormones that can trigger growth.
A. The more characteristics two species will have in common, the more diverse
they are.
B. If reproductive tissues are involved, experiences of an individual during
its lifetime can not be passed on to its progeny, and can not direct
evolution.
3. Only A is true.
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4. Only B is true.
Women ___________ a perfect pair of sex chromosomes, both called X. Men
___________ a mismatched pair in which one is a ___________ X while the other
is a short one called Y.
1. have, paternal
2. have, Mendel
3. have, direct
4. have, normal-sized
A. Change in non-reproductive tissues can not be passed on to the DNA of the
germ cells.
B. Sexually reproducing individuals have one genes for the one trait.
3. Only A is true.
4. Only B is true.
A. Change in non-reproductive tissues can not be passed on to the DNA of the
germ cells.
3. Only A is true.
4. Only B is true.
In human beings, the sex of the individual is ___________ ___________
determined.
1. provides, theory
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2. largely, genetically
3. largely, theory
4. largely, provides
2. Most human chromosomes have a maternal and a paternal copy.
3. In all organisms, there is an inbuilt tendency to variation during
reproduction.
1. The variation in gene frequency is due to natural selection.
2. Traits in one individual may be inherited together, giving rise to new
4. In human beings, the sex of the children will be determined by what they
inherit from their father.
1. Most human chromosomes have a maternal and a paternal copy.
inherit from their father.
3. In human beings, the sex of the individual is largely genetically
determined.
4. Variations arising during the process of reproduction can not be
inherited.
1. If reproductive tissues are involved, experiences of an individual
during its lifetime can not be passed on to its progeny, and can not direct
evolution.
2. Women have a perfect pair of sex chromosomes, both called X. Men have a
mismatched pair in which one is a normal-sized X while the other is a short
one called Y.
3. The more characteristics two species will have in common, the more
diverse they are.
4. In human beings, the sex of the individual is largely genetically
determined.
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1. Most human chromosomes have 22 pairs.
2. The processes of genetic drift and natural selection will result members
of these two groups will be capable of reproducing with each other even if
they happen to meet.
3. Genes control traits.
A. If reproductive tissues are involved, experiences of an individual during
its lifetime can not be passed on to its progeny, and can not direct
evolution.
B. The processes of genetic drift and natural selection will result members
3. Only A is true.
4. Only B is true.
A. Darwin s theory of evolution tells us how Germ cells evolved from simple
B. Speciation may take place with geographical isolation.
3. Only A is true.
4. Only B is true.
The processes of ___________ drift and natural selection will result members
of two groups will be ___________ of reproducing with each other even if they
happen to meet.
1. genetic, contribute
2. beings, new
3. genetic, incapable
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4. genetic, depends
A. In human beings, the sex of the children will be determined by what they
inherit from their mother.
B. The similarity in gene frequency is due to natural selection.
3. Only A is true.
4. Only B is true.
B. In some animals, the temperature and location at which fertilised eggs are
kept determines whether the animals developing in the eggs will be male or
female.
3. Only A is true.
4. Only B is true.
1. In human beings, the sex of the child depends on whether the paternal
chromosome is X or Y. Variations in the species may confer survival
advantages or merely contribute to the genetic drift.
diverse they are.
3. Changes in the non-reproductive tissues caused by environmental factors
are not inheritable.
4. Evolution can be worked out by the study of not just living species, but
fossils.
1. In human beings, the sex of the child depends on whether the paternal
chromosome is X or Y. Variations in the species may confer survival
advantages or merely contribute to the genetic drift.
2. Change in nonproductive tissues can not be passed on to the DNA of the
germ cells.
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3. Organs or features may be adapted to new functions during the course of
evolution.
4. Traits in one individual may be inherited together, giving rise to new
are not inheritable.
3. Speciation may take place when variation is combined with geographical
isolation.
4. The similarity in gene frequency is due to natural selection.
evolution.
2. Feathers are thought to have been initially evolved for warmth and later
adapted for flight.
3. Complex organs may have evolved because of the survival advantage of
even the intermediate stages.
1. Feathers are thought to have been initially evolved for warmth and later
adapted for flight.
are inheritable.
3. Complex organs may have evolved because of the survival advantage of
even the intermediate stages.
23 such pairs.
41) Fill in the blanks in the below sentence
The processes of _____ and _____ will result members of two groups will be
incapable of reproducing with each other even if they happen to meet.
1. genetic drift, natural selection
2. natural selection, other
3. natural selection, thought
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4. natural selection, adapted
If the copies of genes are not identical, the trait that gets expressed is
called the dominant trait and the _____ is called the recessive trait.
1. other, thought
2. other, adapted
3. recessive dominant trait, other
4. other, natural selection
Feathers are _____ to have been initially evolved for warmth and later _____
for flight.
1. adapted, other
2. adapted, recessive dominant trait
3. thought, adapted
4. adapted, natural selection
A. Speciation may take place with geographical isolation.
B. Sometimes genetic drift provides diversity with adaptations.
3. Only A is true.
4. Only B is true.
Homologous characteristic helps to identify an evolutionary relationship
between __________________ different species.
1. relationship
2. estimate
3. living
4. apparently
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A. Organs or features do not get adapted to new functions during the course
of evolution.
B. Both the father and the mother may not contribute practically equal
amounts of genetic material to the child.
3. Only A is true.
4. Only B is true.
The second way of dating fossils is by ___________ the ___________ of
different isotopes of the ___________ element in the fossil material.
1. apparently, characteristic, helps
2. detecting, characteristic, evolutionary
3. detecting, ratios, same
4. detecting, relationship, same
A. In human beings, the sex of the children will be determined by what they
B. Sexually reproducing individuals have one genes for the one trait.
3. Only A is true.
4. Only B is true.
23 such pairs.
2. The second way of dating fossils is by detecting the ratios of different
isotopes of the same element in the fossil material.
3. The fossils we find closer to the surface are more recent than the
fossils we find in deeper layers.
4. Another way of tracing evolutionary relationships depends on
reproduction.
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1. A basic characteristic of cell design that differs among different
organisms is whether the cell has a nucleus.
closely they are related.
evolution.
1. A section of DNA that provides information for one protein is called the
gene for that DNA.
2. Germ cells of asexually reproducing populations are made in specialised
reproductive tissue.
3. Changes in DNA during reproduction are the basic events in evolution.
23 such pairs.
3. The more closely two species are related, the more recently they will
have had a common ancestor.
4. It is true that analysis of the organ structure in fossils allows us to
make estimates of how far back evolutionary relationships go.
evolution.
3. All such preserved traces of living organisms are called fossils.
23 such pairs.
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A. Both the father and the mother may not contribute practically equal
B. Change in nonproductive tissues can not be passed on to the DNA of the
germ cells.
3. Only A is true.
4. Only B is true.
Natural ___________ and genetic drift have together ___________ to the
formation of a population that can not reproduce with the ___________ one.
1. selection, time-dating, fossils
2. selection, led, original
3. selection, time-dating, original
4. simply, time-dating, relationships
A. Natural selection and genetic drift have together led to the formation of
a population that can not reproduce with the original one.
B. The only progressive trend in evolution seems to be that more and more
complex body designs have emerged over time.
3. Only A is true.
4. Only B is true.
A. Variations arising during the process of reproduction can not be
inherited.
B. In some animals, the temperature and location at which fertilised eggs are
kept determines whether the animals developing in the eggs will be male or
female.
3. Only A is true.
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4. Only B is true.
A. Women have a perfect pair of sex chromosomes, both called Y. Men have a
one called X.
3. Only A is true.
4. Only B is true.
1. Skin colour used to be the commonest way of identifying these socalled
races.
3. The earliest members of the human species, Homo sapiens, can be traced
in Africa.
races.
evolution.
4. The species of human beings and chimpanzees have probably evolved in
their own separate ways to give rise to the current forms.
2. Tools such as relationships excavating, time-dating and studying
fossils, DNA sequences have been used for studying human evolution.
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4. Evolution is simply the generation of diversity and the shaping of the
diversity by environmental selection.
1. Tools such as relationships excavating, time-dating and studying
fossils, DNA sequences have been used for studying human evolution.
diverse they are.
3. The earliest members of the human species, Homo sapiens, can be traced
in Africa.
4. Both the father and the mother may not contribute practically equal
races.
3. Women have a perfect pair of sex chromosomes, both called Y. Men have a
one called X.
4. The only progressive trend in evolution seems to be that more and more
complex body designs have emerged over time.
The species of _____ and _____ have probably evolved in their own separate
ways to give rise to the current forms.
1. human beings, chimpanzees
2. chimpanzees, Natural selection
3. chimpanzees, genetic drift
4. chimpanzees, studying
The only progressive trend in evolution seems to be that _____ and _____
_____ body designs have emerged over time.
1. more, complex
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2. complex, Natural selection
3. complex, genetic drift
4. complex, studying
Evolution is simply the _____ of diversity and the _____ of the diversity by
environmental selection.
1. shaping, studying
2. generation, shaping
3. shaping, genetic drift
4. shaping, Natural selection
_____ and _____ have together led to the formation of a population that can
not reproduce with the original one.
1. Natural selection, genetic drift
2. genetic drift, human beings
3. genetic drift, chimpanzees
4. genetic drift, studying
In tracing the family trees of species, there are multiple branches possible
at _____ and every _____ of this process.
1. stage, studying
2. stage, human beings
3. each, stage
4. stage, chimpanzees
Answers
1. 3 2. 1 3. 1 4. 1 5. 1 6. 1,4 7. 1,4 8.
2,3 9. 1,4 10. 1,4 11. 3 12. 4 13. 4 14.
2 15. 4 16. 3,4 17. 2,3 18. 2,3 19. 1,2,3 20.
2,4 21. 1 22. 4 23. 3 24. 3 25. 2 26.
2,3 27. 1,4 28. 1,2,3 29. 2,4 30. 1,3 31. 1 32.
1 33. 3 34. 1 35. 1 36. 1,3,4 37. 1,3 38.
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1,3 39. 2,3 40. 1,3 41. 1 42. 3 43. 3 44.
1 45. 4 46. 1 47. 3 48. 1 49. 2,3,4 50.
1,2 51. 3,4 52. 3,4 53. 2,3 54. 1 55. 2 56.
2 57. 1 58. 1 59. 1,3 60. 2,4 61. 2,4 62.
1,3 63. 1,4 64. 1 65. 1 66. 2 67. 1 68. 3
---End of Test---
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Cbse class 10 science chapter 9 heredity and evolution2015 11-09

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Cbse class 10 science chapter 9 heredity and evolution2015 11-09