Question

Rhizobium bacterias are present in root nodules of leguminous plants.

• A. True
• B. False

Answer 1

The correct option is A True

Rhizobium bacteria found in the root nodules of leguminous plants fix nitrogen. It's a type of soil bacteria that fixes nitrogen from the atmosphere once it's inside the roots of leguminous plants. Nitrogen-fixing cannot be accomplished on its own. As a result, rhizobium requires a plant host. It is an important nitrogen source for agricultural soils, notably those in dry regions, where it fixes free atmospheric nitrogen into nitrites (NO₂^-) and nitrates (NO₃^-) and gives it to plants in exchange for glucose.

• Plants can't fix nitrogen from the air on their own, but they do need it to synthesise amino acids and proteins.
• Rhizobium grows in the cortical cells and creates nodules, which become pink when the nitrogen fixation process begins.

Hence, the above statement is true,