Question

How do non green plants such as fungi and bacteria obtain their nourishment?

Answer 1

they are heterotrophic organisms and thus will derive nitrition from other organisms .
fungi can follow several modes of nutrition such as saprophytic , parasitic , symbiotic , etc .

Answer 2

Answer :

Many fungi and bacteria fall in the category of decomposers. viz. they obtain their food by breaking the organic matter present in the dead plants and animals.

The decomposers play an indispensable role in ecosystem energy flow and biogeochemical cycle.