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Criteria for essentiality' says requirem...

Criteria for essentiality' says requirement of element by the plant is
(a) specific
(b) non-replaceable
(c) absolutely necessary
(d) indirect for metabolism

A

a,b and c

B

a,b and d

C

a and c only

D

a,c and d only

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question regarding the criteria for essentiality of elements required by plants, we need to analyze each of the provided options: 1. **Specific**: The requirement of an essential element by a plant is indeed specific. This means that a particular element cannot be substituted by another element. For example, if a plant requires nitrogen, it cannot be replaced by phosphorus or any other nutrient. Therefore, this option is correct. 2. **Non-replaceable**: This criterion states that the essential element cannot be replaced by any other element for the plant's growth and development. This aligns with the idea that each essential nutrient has a unique role that cannot be fulfilled by any other nutrient. Hence, this option is also correct. 3. **Absolutely necessary**: An essential element must be absolutely necessary for the plant's normal growth, development, and reproduction. Without this element, the plant would not be able to complete its life cycle or would suffer from deficiencies. Therefore, this option is correct as well. 4. **Indirect for metabolism**: This option suggests that the requirement of the element is indirect for metabolism. However, essential elements are directly involved in the metabolic processes of the plant. Thus, this statement is incorrect. Based on the analysis, the correct criteria for essentiality of elements required by plants are: - Specific - Non-replaceable - Absolutely necessary The incorrect option is "indirect for metabolism." **Final Answer**: (a) specific, (b) non-replaceable, (c) absolutely necessary ---
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