Page 85 - Biology - XII

Q4. Choose the correct option.
(a) Thorn is a stiff , strong, and hard structure whereas, tendril is a soft, long, and green structure.

(b) Thorn is dead and tendril is living structure.
(c) Thorn and tendril are dead structures/organs.
(d) All the above are incorrect.
Q5. Cheetah runs on its limbs, whereas, bat fl ies with its forelimbs.

(a) It is a correct statement. (b) It is an incorrect statement.
(c) I have a doubt about bat limbs. (d) I have a doubt on both the statements

Q6. The structures which have diff erent origins and same function are called as ______________ .
(a) homologous structure (b) analogous structure
(c) vestigial structure (d) none of these

Q7. Wing of an insect and wing of a bird are examples of _______________ .
(a) homologous structure (b) analogous structure
(c) vestigial structure (d) none of these

Q8. When species from diff erent habitats start living in common habitat are called as _________ .
(a) convergent evolution (b) divergent evolution
(c) parallel evolution (d) all of these

Q9. All of the following are examples of convergent evolution except
(a) wing of an insect and wing of a bird (b) stem of potato and root of sweet potato
(c) forelimb of human and whale (d) both (a) and (b)

Q10. Analogous structure leads to ____________ evolution.
(a) convergent (b) divergent (c) parallel (d) all of these
Q11. Which of the following is an example of analogous structure?

(a) Wing of an insect and wing of a bird (b) Stem of potato and root of sweet potato
(c) Both (a) and (b) (d) None of these

Q12. Which of the following types of structures are evolved on the basis of anatomical evidences?
(a) Homologous structure (b) Analogous structure
(c) Vestigial structure (d) All of these

Q13. Observe the fi gure and answer the question.

(a) These are wings of three diff erent animals.
(b) These wings of diff erent animals are used for fl ying by the respective animals.
(c) These body organs of animals represent analogous structures for the purpose of fl ying by the
animals that have it.
(d) (a), (b), and (c)

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