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Question

Rhizobium can be found in the root nodules of which of the following plants?

A
Carrot
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B
Soybean
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C
Pea
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D
Sweet potato
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Solution

The correct options are
B Soybean
C Pea
Rhizobium is usually found in the root nodules of leguminous plants like soybean and pea. Plants cannot take up nitrogen directly from the atmosphere. This nitrogen has to be 'fixed' to the soil for the plants to absorb it. Rhizobium helps in fixing nitrogen, it convertes the atmospheric nitrogen into ammonia and is used by the plant.

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