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Process of evolution is...

Process of evolution is

A

continuous

B

discontinuous

C

continuous in the past but discontinuous presently

D

discontinuous in the past but continous presently

Text Solution

Verified by Experts

The correct Answer is:
a
The spermatids are formed after the completion of maturation division during spermatogenesis, hence contain n number of chromosomes, i.e., 23
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GRB PUBLICATION-ORGANIC EVOLUTION -REPRODUCTIVE ISOLATION
  1. Process of evolution is

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  2. Species that do not interbreed in nature are said to be ,

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  3. Which of the following evolutionary mechanisms acts to slow down or pr...

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  4. Reproductive isolating mechanisms :

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  5. In many species of fireflies, males flash to attract females. Each spe...

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  6. When potential mates occupy overlapping ranges but reproduce at differ...

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  7. Two species of water lilies in the same pond do not interbreed because...

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  8. Individuals of differnet species living in the same area may be preven...

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  9. Which of the following reproductive barriers actually prevents individ...

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  10. Which of the following is an example of postzygotic reproductive barri...

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  11. Which of the follownig is an example of postzygotic reproductive barri...

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  12. To Cuvier, the difference in fossils from different strata were eviden...

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  13. Darwin proposed that new species evolve from ancestral forms by the :

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  14. The best description of natural selection is :

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  15. The evolution of similar characters in genetically unrelated species a...

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  16. The classical example of adaptive radiation in development of new spec...

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  17. the chance of elimination of genes from a small populaton is an exampl...

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  18. The spread of genes from one breeding populatoni to another by migrati...

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  19. Two organs which are similar in structure and origin, but not necessar...

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  20. An important evidence in favour of organic evolution is the occurrence...

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  21. Which of the following is vestigial organ in human?

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