Which of the following characteristics defines an element as essential – McqOptions

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1.	Which of the following characteristics defines an element as essential for a particular species?
A.	It has to be added as fertiliser to achieve maximum seed production.
B.	If it is missing, a plant cannot grow or reproduce normally.
C.	If it is present in high concentration, plant growth increases.
D.	If it is absent, other nutrients may be substituted for it.
Answer» C. If it is present in high concentration, plant growth increases.

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