NEET Biology question

Not in NEET syllabus

An essential element is one which

(A)Improves the health of the plant
(B)Is irreplaceable and indispensable for growth of plantsCorrect
(C)Is found in plant ash
(D)Is available in the soil

Answer: (B)

Solution

By the Arnon and Stout criteria, an element is "essential" only if it is absolutely required for completing the plant's life cycle, cannot be substituted by any other

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Question ID VK-112721