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[A]: Evolution is a theory. [R]: As...

[A]: Evolution is a theory.
[R]: As it is based on causes and evidences.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

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The correct Answer is:
A
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TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Some babies have a small tail. [R]: This is just a freak of ...

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  2. [A]: The first life orginated was chemo-het- erotrophic. [R]: The...

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  3. [A]: Evolution is a theory. [R]: As it is based on causes and evi...

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  4. [A]: Cabbage, cauliflower, Kohlrabi, Broccoli and Brussels have descen...

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  5. [A]: Evolution is not occurring at present. [R]: Evolution is a v...

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  6. [A]: According to the theory of Lamarck use and disue caused the incre...

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  7. [A]: Fossils of Peking man were discovered from caves near Peking in 1...

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  8. [A]: Man's most characteristic feature in which it differs from all it...

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  9. [A]: Darwin held that small favourable varia- tions formed the raw mat...

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  10. Assertion : A single mutation may produce a new species . Reason : M...

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  11. [A]: Isolation prevents inbreeding among the otherwise potential mates...

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  12. [A]: lnterspecific mating often produces a more vigorous but sterile F...

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  13. [A]: Basis of adaptation is the preexisting gene mutation. [R]: I...

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  14. [A]: Artitical selection is done only in animal breeding. [R]: Ar...

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  15. [A]: Presence of tail in children is a vestigial character. [R]: T...

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  16. [A]: Mimics are always or more often defenceless. [R]: Mimics are...

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  17. [A]: The process of speciation occurs only in allopatric populations. ...

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  18. [A]: The establishment of reproductive isola- tion is an event of biol...

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  19. [A]: Random mutations together with genetic drifts and selection press...

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  20. [A]: Varied groups of plants and animals ei- ther related or unrelated...

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