Question

Nostoc keeps a symbiotic relation ______.

विकल्प

• with the root of Pinus

• with coralloid root of Cycas

• with the root of rose

• all of the above

Answer 1

Nostoc keeps a symbiotic relation with coralloid root of Cycas.

Explanation:

Nostoc, a cyanobacterium, fixes atmospheric nitrogen into usable nitrates and provides it to the Cycas plant. In return, the specialized coralloid roots of Cycas provide a protected, stable environment for Nostoc.