NEET Biology question

Biology Mineral Nutrition NEET

Not in NEET syllabus

On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if we assume that the yellowing of leaves appeared first in

(A)Old leavesCorrect
(B)Young leaves
(C)Young leaves followed by mature leaves
(D)Young leaves followed by young leaves

Answer: (A)

Solution

Nitrogen is a mobile element: when deficient, it is withdrawn from older, senescing leaves and mobilised to actively growing young tissues, so nitrogen-deficiency chlorosis characteristically

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Question ID VK-112724