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Q.

Which of the following is not the criteria for essentiality of an element with respect to growth and development in plants?

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a

The element must be absolutely necessary for supporting normal growth and reproduction. 

b

The element must be directly involved in the metabolism of the plant.

c

In the absence of the element the plants do not complete their life cycle or set the seeds.

d

The element must be dispensable.

answer is C.

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Detailed Solution

Essential elements are indispensable in nature. Requirement of the essential element is specific and cannot be replaceable by another element. In other words, deficiency of any essential element cannot be met by supplying some other element.

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