The two micro-organisms which live in symbiotic association in lichens

The two micro-organisms which live in symbiotic association in lichens are

  1. fungus and protozoa
  2. alga and bacteria
  3. bacteria and protozoa
  4. alga and fungus

Answer

Lichens is an association between a fungal and an algal species. It is mutually benefiting association where algae provides food to the fungus and in return gets shelter from it.

The correct option is D.