OBJECTIVE LIFE SCIENCE
DEVELOPMENTAL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Assertion (A):Kidney is ectodermal derivative. Reason (R):Kidney develop from intermediate mesoderm or mesomere.
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Both A and R are correct.
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Both A and R are wrong.
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A is correct and R is wrong.
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A is wrong and R is correct.
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Explanation:
Detailed explanation-1: -After gastrulation in mammals, the kidney develops from the intermediate mesoderm as a continuum along the anteroposterior axis in a distinct temporal sequence (Fig.
Detailed explanation-2: -Human kidney development begins as early as the third week of embryonic development, with formation of the pronephros, followed by the mesonephros at 4 weeks and the metanephros at 5 weeks gestation. The first glomeruli appear at nine weeks in humans, and nephrogenesis is complete by 36 weeks gestation.
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