Question

Which of the following roles is not a criterion for essentiality of an element?

• A. In its absence, plants do not set seeds
• B. Irreplaceable by another element
• C. Indirectly involved in the metabolism of the plant
• D. Absolutely necessary for metabolism

Answer 1

Answer:

C. Indirectly involved in the metabolism of the plant

• The criteria of essentiality include:

• i. The element must be absolutely necessary for supporting normal growth and reproduction. In the absence of the element, plants do not set the seeds.

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

• iii. The element must not be replaceable by another element.