a student is studying microorganisms and recalls that one type of microorganisms decomposes organic matter while another type fixes nitrogen from the atmosphere. Which 2 types of microorganisms is the student describing?

1. fungi
2. algae
3. viruses
4. bacteria
5. parasites
6. plants

The two types of microorganisms being described are bacteria and fungi.

Bacteria decompose organic matter, while fungi fix nitrogen from the atmosphere.