Microorganisms ...

An example of infectious disease is:

The organisms which cause diseases in plants and animals are called:

Nitrogen is absorbed by the plants in the form of____________.

Nitrogen is one of the essential constituents of all living organisms as part of 

Nitrogen fixation is the process of:

Blue-green algae are able to fix nitrogen from the _________________.

The circulation of nitrogen between organisms and the atmosphere is called the _____________________.

The percentage of nitrogen in the atmosphere is_______.

____________________ is an essential constituent of proteins, nucleic acids, chlorophyll and vitamins. 

Rhizobium bacteria live in the root nodules of