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Which of the following is an example of ...

Which of the following is an example of postzygotic reproductive barrier ?

A

Pollen of one kind of tobacco canot fertilize another kind

B

Two species of bull frogs have different mating cells

C

Mallard and pintail ducks mate at different time of year

D

Hybrid offspring of two species of jimsonweeds always die before reproducing

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The correct Answer is:
d
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GRB PUBLICATION-ORGANIC EVOLUTION -REPRODUCTIVE ISOLATION
  1. Individuals of differnet species living in the same area may be preven...

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

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

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

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

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

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  7. The best description of natural selection is :

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

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

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

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

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

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

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

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  15. Hardy -Weinberg equilibrium operates in absence of :

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  16. Hardy-Weinberg principle explains :

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  17. The non- directional force that alters Hardy-Weinberg equilibrium is :

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  18. Fossil bird having reptilian character evolved during which period ?

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  19. Jurassic period of the Mesozoic era is characterised by

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  20. Which one of the following is not a living fossil Or Missing link ...

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