Class 12 Biology Reproduction Sexual Reproduction in Flowering Plants



Assertion :The two cotyledons in seed are the embryonic leaves.
Reason :The embryo contains radicle and plumule.
(a)
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
(b)
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
(c)
Assertion is correct but Reason is incorrect
(d)
Both Assertion and Reason are incorrect
Correct answer: (b) 
Solution: 

A. In pulses, each seed encloses an embryo which can be examined after removing the seed coats. The bulk of embryo consists of two large, white and kidney shaped cotyledons( or seed leaves). They store reserve food material in the form of carbohydrates and proteins to provide nourishment to embryonal axis at the time of germination and growth of young seedling.

B. The micropylar end of embryonal axis is rod- shaped and slightly bulged. It is called radicle( embryonic root). The other side of embryonal axis lies in between the two cotyledons. It is called plumule (the shoot tip). The shoot tip remains protected by two small, folded leaves. So, the correct answer is 'Both assertion and reason are correct but reason is not the correct explaination for assertion'.


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Similar topics
sexual reproduction in flowering plants
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Connecting you to a tutor in 60 seconds.
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sexual reproduction in flowering plants
reproduction in organisms
evolution
human reproduction
reproductive health