Question

Question 1 (b)
Blue green algae fix ___ directly from air to enhance fertility of soil.

Answer 1

Blue green algae fix nitrogen directly from air to enhance the fertility of the soil.

The blue-green algae (also known as cyanobacteria) has the ability to process atmospheric nitrogen and render it into an organic form.This process is called nitrogen fixing. It helps to enhance the fertility of the soil and is very important for the growth of plants.