The plants symbiotically associated with nitrogen fixers belong to

Which of the following is a free living aerobic nitrogen fixer?

Which of the following is an autotroph?

What is the unique chemical found in bacterial cell wall?

What is the bacterium called, which bears flagella all over its surface?

Which of the following represents the smallest bacteria?

The staining principle in gram-stain is

The resting spores of bacteria are called

Which of the following are the most important sources of antibiotics?

Which of the following is a symbiotic N₂ fixer?

What is a bacterial cell called that contains viral genome attached to its DNA?

Which of the following microbes reduces soil fertility?

The spherical bacteria are represented by which of the following?

Bacteria lack which of the following processes?

Which of the following is the respiratory organelle in bacteria?