Heterotrophic bacteria obtain food by

Heterotrophic cells must ingest biomass to obtain their energy and nutrition. Heterotrophic microorganisms mostly feed upon dead plants and animals, and are known as decomposers. ... Some animals also specialize on feeding on dead organic matter, and are known as scavengers or detritivores. Hope this was helpful.

The answer is nitrogen-containing bases

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;