List the cell types above according to the way in which they obtain their energy. include viruses in your answer as well:
(a) autotrophic:
(b) heterotrophic:

answer; hypnagogic sensations)

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.