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Question

Mycorrhiza does not help the host plant in

A
enhancing its phosphorus uptake capacity
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B
increasing its tolerance to drought
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C
enhancing its resistance to root pathogens
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D
increasing its resistance to insects
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Solution

The correct option is D increasing its resistance to insects
Mycorrhizas are symbiotic relationships between fungi and plant roots. Such plant also show resistance to root pathogens but they do not show resistance to insects.

They are particularly important in assisting the host plant with the uptake of phosphorus which is vital to plant growth.
They also increase the surface area associated with the plant root, which allows the plant to reach nutrients and water that might not be available otherwise. Thus increasing its tolerance to drought.

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