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Assertion :- The original drifted popula...

Assertion :- The original drifted population in new habitat becomes founder and the effect is called founder effect.
Reason :- Darwin finches of Galapagos island shows adaptive radiation.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

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The correct Answer is:
B
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Assertion : Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds. Reason : Ancestral seed-eating stock of Darwin's finches radiated out from South American mainland to different geographical areas of the Galapagos Island, where they found competitor-free new habitats.

Assertion : Darwin's finches show a variety of beaks and cactus seeds. Reason : Ancestral seed-eating strock of Darwin's finches radiated out from South American mainland to different geographical areas of the Galapagos Island, where they found competitor-free new habitats.

Fill up the balnks in the following paragraph by selecting the correct option. When migration of a section of population to another place and population occurs, I change in the original as well as in the new population new genes/ alleles are added to the ii, population and these are lost from the population. These would be a iv if this gene migration, happens multiple times. if the same change occurs by chance, it is called v. sometimes the change in allele frequency is so different in the new sample of population that they become a diffrent species. The original drifted population becomes founders and the effect is called vi

Assertion :-Tasmanian wolf and Placental wolf are the good example of convergent evolution. Reason :- More than one adaptive radiation appeared to have occured in an isolated geographical area, (representing different habitats) one can call this convergent evolution.

Assertion: Darwin's finches of Galapagos islands have different types of modified beaks according to their food habits. Reason: Adaptive radiation, leads to development of different functional structure from a common ancestral form.

Assertion Founder principle is associated with the genetic drift Reason Genetic drift is significant in small populations

Assertion Genetic drift is also called Sewall Wright effect Reason Genetic drift was discovered by American geneticist Sewall Wright

MOTION-EVOLUTION-Exercise - 4
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  3. Assertion :- In a mixed population those that can better-adapt, surviv...

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  4. Assertion :- Australian marsupials can be taken as an example of adapt...

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  5. Assertion :-Tasmanian wolf and Placental wolf are the good example of ...

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  6. Assertion :- The rate of appearance of new forms is liked to the life ...

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  7. Assertion :- According to Lamarck, evolution of life forms had occured...

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  8. Assertion :- According to Hugo de Vries , it is mutation which causes ...

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  9. Assertion : Due to continental drift, when South America joined North ...

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  10. Assertion :- Big-Bang theory lalks of a singular huge explosion unimag...

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  11. Assertion :- All mammals like whales, bats cheetah and human etc. shar...

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  12. Assertion :- Branching descent and Natural selection are the two key c...

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  13. Assertion :- Analogous structures are a result of convergent evolution...

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  14. Assertion :- The original drifted population in new habitat becomes fo...

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  15. Assertion :- Homologous organs suggest same origin. Reason :- Organs...

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  16. Assertion : Origin of virus like structure is an example of retrogress...

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  17. Assertion:- The aquatic mammals like Dolphins whales etc. do not conta...

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  18. Assertion :- Dog fish and Whale are example of Homology. Reason : An...

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  19. Assertion :-Analogous organs show common ancestory. Reason :-Analogo...

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  20. Assertion :- Darwin's finches are calssical example of natural selecti...

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