Question

Nitrogen-fixing bacteria, such as cyanobacteria, can use atmospheric nitrogen (n2) for their nitrogen source. Nitrogen-fixing bacteria, such as cyanobacteria, can use atmospheric nitrogen (n2) for their nitrogen source.

a. True
b. False

Answer 1

a. True.

Cyanobacteria can use atmospheric nitrogen as their nitrogen source.

It takes a large amount of metabolic energy for them to do this, but cyanobacteria use sunlight for their energy supply.