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Assertion (A) : From evolutionary point ...

Assertion (A) : From evolutionary point of view, human gestation period is believed to be shortening.
Reason (R ) : One major evolutionary trend in humans has been the larger head undergoing relatively faster growth rate in the foetal stage.

A

Both (A) and (R ) are true and the (R ) is the correct explanation of the (A)

B

Both (A) and (R ) are true but the (R ) is not the correct explanation of the (A)

C

(A) is true statement but (R ) is false

D

Both (A) and (R ) are false

Text Solution

Verified by Experts

The correct Answer is:
D
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Assertion : From evolutionary point of view, human gestation period is believed to be shortening. Reason : One major evolutionary trend in humans has been the larger head undergoing relatively faster growth rate in the foetal stage.

Given belwo are assertin and reason. Point out if both are true with reason being correct explanation (A). Both are true but reason is not correct explanantion (B), assertion is true but reason is wrong ©, and both are wrong (D) Assertion From evolutionary point of view. human gastation period is sortening. Reason A major trent in humans has been larger head undergoing faster growth in foetal stages.

A : The brain reaches between 75 and 80 percent of adult size withln the first two years, and its full size at the age of 6 years. R : From evolutionary point of view, human gestation period is belived to be shortening.

In this section each item consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and 56. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark your response accordingly on Answer Sheet. S1: Biology is the study of life in its entirety. S6: Classical descriptive and clueless biology found a theoretical framework in the evolutionary theory of Darwin P: In later years, the focus was physiology and internal morphology or anatomy. Q: Darwinian ideas of evolution by natural selection changed the perception completely. R: The growth of biology as a natural science during the last 1000 years is interesting from many points of view. S: One feature of this growth is changing emphasis from mere description of life forms to identification and classification of all recorded living forms. The correct sequence should be

GRB PUBLICATION-Human Evolution -Assertion-Reason Type Questions
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  2. Like begets like' is an important and universal phenomenon of life. ...

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  3. Mendel's work was not accepted by the scientific community from 1865 t...

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  4. The year 1900 is highly significant for geneticists. Mendelism was ...

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  5. Assertion : Test cross is the cross between the F(1) progeny and eithe...

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  6. Read the given statements and select the correct option Statement 1 ...

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  7. Mendel was able to explain the fundamentals of genetics. He knew n...

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  8. Mendel did not recognize linkage. The characters studied in pea by ...

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  9. In four o' clock plant crossing of red flowered strain with a white fl...

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  10. A classical example of multiple alleles is found in Rh blood grouping ...

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  11. Albinism in corn Zea mays is due to lethal gene. The mutant plant i...

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  12. All dissimilarities of characters between members of same species are ...

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  13. Neurospora is useful for genetic and biochemical studies. It is a ...

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  14. Neurospora is known as 'Drosophila of the plant kingdom'. It posses...

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  15. The asexual reproduction in Neurospora occurs through ascospores. A...

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  16. Tetrad analysis can be done easily in Neurospora. An ascus contains...

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  17. Kappa particles are present in the cytoplasm of Paramecium. They a...

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  18. The cytoplasmic genes do not show Mendelian inheritance. In this re...

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  19. Drosophila is extensively used in genetical research. Fruitfly pos...

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  20. Crossing over results in the recombination of linked genes. It takes...

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  21. Cistron is the fundamental unit DNA molecule. It codes for a partic...

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