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Which is not a criterion for the essenti...

Which is not a criterion for the essentiality of a mineral?

A

Direct role in metabolism

B

Requirement is specific

C

Deficiency causes hunger signs

D

Dispensable for growth

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The correct Answer is:
D
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  2. a plant requires magnesium for :

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  7. Nitrogen fixation in root nodules of Alnus is brought about by

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  8. Nitrogen fixation in root nodules of Alnus is brought about by

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  9. Guard cells help in

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  10. Manganese is required in

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  11. Which of the following is a symbiotic nitrogen fixer ?

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  12. Which one of the following pairs is wrongly matched?

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  13. An element playing important role in nitrogen fixation is

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  14. Which one of the following is not a micronutrient

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  16. Which one of the following structures between two adjacent cells is an...

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  18. The common nitrogen-fixer in paddy fields is

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