Question

Nitrogen fixation occurs in ________________.

• A. Some herbaceous plants and legumes
• B. Legumes and some bacteria
• C. Some bacteria, cyanobacteria and legumes
• D. All green plants

Answer 1

The correct option is C Some bacteria, cyanobacteria and legumes

C. Some bacteria, cyanobacteria and legumes

Solution : Nitrogen fixation is seen in some bacteria and leguminous plants that have root nodules where the bacteria is in symbiotic association with the plant roots. Cyanobacteria also have heterocysts that fix atmospheric Nitrogen .

So the correct answer is " Some bacteria, cyan bacteria and legumes".