Question

Nitrogen-fixing bacteria are most likely to be found

• A. On the stems of some plants.
• B. In the leaves of trees.
• C. On the roots of some plants.
• D. On atmospheric dust particles.
• E. With blue-green algae.

Answer 1

The correct option is C On the roots of some plants.

Root nodules are the site of nitrogen fixation in leguminous plants. So, nitrogen fixing bacteria are most likely to be found in root nodules of these plants. Free-living nitrogen fixing bacteria are present in soil only. Thus, the correct answer is C.