Cyanobacteria are characterised by

Options

A. Oxygenic with nitrogenase
B. Oxygenic without nitrogenase
C. Non-oxygenic with nitrogenase
D. Non-oxygenic without nitrogenase

Answer

A

Explanation

(a) Cyanobacteria (Gk. Kyanos = dark blue, bakterion = a staff) also known as blue-green algae. It is a very important group of photo synthetic bacteria in the history of life on earth. The cyanobacteria fix atmospheric nitrogenase and also show oxygenic photosynthetic.