Question

Which organisms are primarily responsible for nitrogen fixation?

• A. Producers
• B. Consumers
• C. Plants
• D. Bacteria
• E. Humans

Answer 1

The correct option is D Bacteria

A. Producers are the green plants that capture light energy and convert it into chemical energy.

B. Consumers are the animals that feed on producers. Consumers may be primary, secondary or tertiary.

C. Plants are the producers that convert solar energy into chemical energy.

D. Bacteria are the microorganisms that can perform various biological processes like Nitrogen fixation. For example, Rhizobium can fix atmospheric nitrogen.

E. Humans are the multicellular heterotrophic organisms that solely depend on producers for food.

Hence organisms primarily responsible for nitrogen fixation are Bacteria.

So, the correct answer is 'Bacteria'.