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[A]: Convergent evolution leads to produ...

[A]: Convergent evolution leads to production of analogous similarities among different groups of organisms.
[R]: Animals of the same group or closely related groups exhibit great divergences in their morphology

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:
B
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Why are properties of transition elements of the same series similar, though they belong to different groups ?

[A]: Macro evolution produces groups of parallel special adaptations among convergent but related species. [R]: Adaptive radiation/macroevolution don't produce evolutionary lines that converge in special adaptation with other related groups differing in general adaptation

Elements of same group exhibit similar chemical properties- why?

A group of animals which are related by descent and share many similarities are referred to as

[A]: Homology is the similarity between organs of same animal based on common ancestry. [R]: Analogy is seen in every organ system from fish to man

[A]: In large groups of animals and plants, there are identical enzymes and hormones available. [R]: This suggests organic evolution

[A]: Varied groups of plants and animals ei- ther related or unrelated provide an example of divergent evolution. [R]: The changes occur in a cumulative direc- tion and result in the origin of new popula- tions from the old ones

It is said that elemental composition of living organisms and that of inanimate objects (like earth's crust ) are similar in the sense that all the major elements are present in both. Then what would be the difference between these two groups ? Choose a correct answer from the following.

A group of similar organisms, which freely breeds among themselves is .........

[A]: During evolution of Primates, various groups diverged in a particular sequence from the main line of descent. [R]: Prosimians (Tarsiers, lemurs) which di- verged first, are most distantly related to hu- mans and most closely related to original pri- mates.

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Homology is the similarity between organs of same animal based on...

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  2. [A]: Ear muscles of external ear in man are well developed. [R]:...

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  3. [A]: Convergent evolution leads to production of analogous similaritie...

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  4. [A]: Heritable changes are also called muta- tions. [R]: Mutation...

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  5. [A]: In some organisms the end stages of the ancestral development pat...

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  6. [A]: Homologous organs have similar structure but different functions....

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  7. [A]: In large groups of animals and plants, there are identical enzyme...

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  8. [A]: During evolution of Primates, various groups diverged in a partic...

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  9. [A]: Macro evolution produces groups of parallel special adaptations a...

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  10. [A] : Organisms that bear large number of common amino acid sequence m...

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  11. [A]: Homologous organs are similar in basic structure and embryonic or...

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  12. Assertion:Analogous organs serve the same function and look alike, but...

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  13. Assertion:Frog's tadpole has fish-like form, tail and gills Reason: ...

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  14. Assertion:Jurassic period is considered as the age of reptiles. Reas...

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  15. [A]: Some babies have a small tail. [R]: This is just a freak of ...

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  16. [A]: The first life originated was chemoheterotrophic. [R]: The f...

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

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

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

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  20. [A]: According to the theory of Lamarck use and disuse caused the incr...

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