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BIOLOGY

JAMB 2010 - Question 29

Biology 2010 JAMB Past Questions - Question 29: Mycorrhizae promote plant growth by

Choose the most appropriate option for the gap .

Mycorrhizae promote plant growth by

A: protecting it from infection.

B: helping it to utilize atmospheric nitrogen.

C: serving as a growth regulator.

D: absorbing inorganic ions from the soil

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Correct Answer

Explanation

B - Mycorrhiza is a symbiotic association between fungus and roots of higher plants (especially the conifers) that live in soild efficient in nitrogen. The fungus may live on the surface of the root or inside the root. The fungus has the ability to breakdown the humus or organic matter to release nitrogen which the higher plants . utilize to synthesize protein (food). the food is shared between the plants and fungus.