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Assertion :- Moderate decrease of micron...

Assertion :- Moderate decrease of micronutrients causes the deficiency symptoms and moderate increase causes toxicity.
Reason:- There is a narrow range of concentration at which micronutrients are optimum.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

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The correct Answer is:
A
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(a) Moderate decrease of increase on micronutrients causes deficiency and toxicaity symptoms respectively. (b) Excess of manganese causes toxicity of iron calcium and molybdenum. (c ) A macronutrients said to be toxic when present below a critical concentration.

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MOTION-MINERAL NUTRITION -EXERCISE-4
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  4. Assertion :- The element is said to be deficient when present below th...

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  5. Assertion :- Deficiency symptoms of NPK first appear on old plant part...

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  6. Assertion :- Deficiency of any element can cause multiple symptoms. ...

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  7. Assertion :- Moderate decrease of micronutrients causes the deficiency...

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  8. Assertion :- Excess of Mn may induce deficiency of Fe, Mg & Ca. Reas...

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  9. Assertion :- Initial uptake of ions is rapid while second phase of upt...

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  11. Assertion :- Nitrifying bacteria are chemoautotrophs. Reason:- Nitri...

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  12. Assertion :- Conversion of nitrate to ammonia takes place in leaves wh...

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  13. Assertion :- Only certain prokaryotic species are capable of fixing ni...

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  14. Assertion :- Both Rhizobium and Frankia are free living bacteria. Re...

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  15. Assertion :- Enzyme nitrogenase is highly sensitive to the molecular o...

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  16. Assertion :- Nitrogen fixation is one of the energy dependent process....

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  18. Assertion :- All minerals can not be passively absorbed by the roots. ...

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  19. Assertion :- Active mineral absorption favours passive absorption of w...

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  20. Assertion :- Most of the mineral absorption by plant is active process...

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