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Question

The function of bacteria present in the root nodules of leguminous plants is:
  1. To store food
  2. To perform photosynthesis
  3. To fix the atmospheric nitrogen
  4. To simplify the complex minerals present in the soil

A
To simplify the complex minerals present in the soil
B
To perform photosynthesis
C
To fix the atmospheric nitrogen
D
To store food
Solution
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The roots of leguminous plants form a symbiotic association with a bacterium, Rhizobium.
The bacteria penetrate the roots and form nodules. They help in the fixation of atmospheric nitrogen by converting it into usable nitrogenous compounds. Thus, the correct answer is option C.

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