Question

Statement 1: Atmospheric nitrogen cannot be used up directly by the plants.

Statement 2: Rhizobium lives in a symbiotic relationship with legumes.

• A. Only statement 1 is correct
• B. Only statement 2 is correct
• C. Both the statements are correct
• D. Both the statement are incorrect

Answer 1

The correct option is C Both the statements are correct

Atmospheric nitrogen cannot be used up directly by the plants as it is unreactive. It is fixed in the soil by certain bacteria, blue green algae, etc.
Rhizobium is a nitrogen fixing soil bacterium. It lives in the root nodules of the leguminous plants like pea, beans, etc symbiotically. Rhizobium fixes nitrogen for the legumes, and in return it gets shelter in the root nodules of the plants.