| 1. | Human offspring’s sex is determined ? | |
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by hormones.
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through mother’s sex chromosomes.
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through father’s sex chromosomes.
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by enzymes.
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Report Question| 2. | Exchange of genetic material takes place in ? | |
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Budding
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Asexual reproduction
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Vegetative reproduction
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Sexual reproduction
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| 3. | Surgically removing tails of mice over several generations do not yield mice without tails. This proves that ? | |
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Cutting tail does not cause genetic change. So it not inherited.
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Acquired characters during ones own life are not inherited.
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Neither a nor b is correct
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Both a and b are correct
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| 4. | A cross between a tall plant (tt) and short pea plant (tt) resulted in progeny that were all tall plants because ? | |
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Height of pea plant is not governed by gene ‘T’ or ‘t’
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Tallness is the recessive trait
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Shortness is the dominant trait
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Tallness is the dominant trait
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| 5. | Natural selection is called ‘survival of the fittest’. Which of the following statements best describes an organism ? | |
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The number of fertiie offspring it has.
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The ability to adapt to the environment in the niche it occupies.
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How much food and resources it is able to gather for its offspring.
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How strong it is compared to other individuals of the same species.
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| 6. | Which of the following is the ancestor of ‘Broccoli’ ? | |
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Kale
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Wild cabbage
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Cauliflower
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Cabbage
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| 7. | The fossil remains of Archaeopteryx is a connecting link between ? | |
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amphibian and reptile
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fish and amphibian
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reptiles and bird
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reptiles and mammals
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| 8. | The number of pairs of sex chromosomes in the zygote of a human being is ? | |
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4
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1
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3
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2
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| 9. | Process of selecting individuals with desired characters by man is called ? | |
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Natural selection
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Reproduction
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Hybridization
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Artificial selection
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| 10. | Which of the following characters can be acquired but not inherited ? | |
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Texture of hair
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Colour of eyes
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Size of body
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Colour of skin
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