Question

Microscopic single called organisms that can survive in extreme environments are

Answer 1

Bacteria organisms

Step-by-step explanation:

They are the smallest organisms that can be observed under a microscope. Viruses are non living

Answer 2

extremophiles

Step-by-step explanation:

Most extremophiles are microorganisms (and a high proportion of these are archaea), but this group also includes eukaryotes such as protists