Essentiality criteria of an element :
Correct answer: D. All of theseDownload Nature Guides
- A. In the absence of an element, its not possible for plant to complete its vegetative cycle.
- B. The role played by an element is specific & can not be replaced by another element.
- C. The element is directly involved in the nutrition of the plant.
- D. All of theseDownload Nature Guides
Explanation
An element is essential only when its absence prevents completion of the plant's life cycle, its function cannot be replaced, and it participates directly in plant nutrition. These three conditions together define essentiality.
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