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Question 1 of 30
1. Question
Assertion: Specialization is the reproductive isolation amongst once interbreeding population.
Reason: Genetic drift, Natural selection and Severe DNA change can cause specialization.CorrectIncorrect -
Question 2 of 30
2. Question
Assertion: Acquired trait cannot be passed on from one generation to next generation.
Reason: Inaccuracy during DNA copying of acquired trait is minimum.CorrectIncorrect -
Question 3 of 30
3. Question
Human offspring’s sex is determined
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Question 4 of 30
4. Question
Wing of a bird and wing of an insect are
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Question 5 of 30
5. Question
Which concept was not included in Charles Darwin’s theory of Natural Selection?
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Question 6 of 30
6. Question
The remaps (or impressions) of dead animals or plant? that lived in the remote past are known as
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Question 7 of 30
7. Question
Natural selection is called ‘survival of the fittest’. Which of the following statements best describes an organism?
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Question 8 of 30
8. Question
The process by which new species develop from the existing species is known as
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Question 9 of 30
9. Question
The more characteristics two species have in common :
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Question 10 of 30
10. Question
A cross between two individuals results in a ratio of 9 : 3 : 3 :1 for four possible phenotypes of progeny. This is an example of a
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Question 11 of 30
11. Question
Two pink colored flowers on crossing results in 1 red, 2 pink and 1 white flower progeny. The nature of the cross is-
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Question 12 of 30
12. Question
Differences between organisms in a species are described as variation. Which of the following would you describe as continuous variation?
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Question 13 of 30
13. Question
Those organs which have the same basic structure but different functions are called
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Question 14 of 30
14. Question
A man with blood group A marries a woman having blood group O. What will be the blood group of the child?
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Question 15 of 30
15. Question
The concept of origin of species by natural selection was given by.
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Question 16 of 30
16. Question
Which of the following is not correct-
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Question 17 of 30
17. Question
Which of the following is the ancestor of ‘Broccoli’?
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Question 18 of 30
18. Question
The process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring and those characteristics which do not help are not passed on is called
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Question 19 of 30
19. Question
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that-
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Question 20 of 30
20. Question
Process of selecting individuals with desired characters by man is called
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Question 21 of 30
21. Question
Select the group which shares maximum number of common characters-
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Question 22 of 30
22. Question
Which of the following scientist gave the principles of inheritance?
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Question 23 of 30
23. Question
Assertion: Human, frog and bird have a common ancestor.
Reason: Limbs of human, bird and frog are homologous.CorrectIncorrect -
Question 24 of 30
24. Question
Assertion: Variation is high in sexually reproducing organisms compared to asexually reproducing organisms.
Reason: Inaccuracies during DNA copying give rise to variation.CorrectIncorrect -
Question 25 of 30
25. Question
An example of homologous organs is
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Question 26 of 30
26. Question
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as
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Question 27 of 30
27. Question
Wild cabbage has evolved into new varieties like cabbage, broccoli and cauliflower by
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Question 28 of 30
28. Question
The fossil remains of Archaeology is a connecting link between
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Question 29 of 30
29. Question
What is the difference between genetic drift and change due to natural selection?
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Question 30 of 30
30. Question
The theory of chemical evolution of life was experimentally demonstrated by-
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