Boron in green plants assists in

The association between blue-green algae and fungi occures in :

Which of the following can fix atmospheric nitrogen ?

Mycorrhiza is a symbiotic relationship between roots of higher plants and

Dough kept overnight in warm weather becomes soft and spongy because of

The translocation of organic solutes in sieve tube members is supported by

Which one of  the following is not essential element for plants?

Gray spots of oat are caused by deficiency of

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organisms?

Enzyme involved in nitrogen assimilation