An ecosystem is made of both biotic and
abiotic things. Which describes the biotic
part of the ecosystem?

A. plants that grow in soil

B. the animals that breathe oxygen

C. all living things in the environment

D. plants and animals that live in water

Need ! will give 20 points! what are two ways that diatoms differ from slime molds? the external coverings of diatoms are made up of (silica, chitin or peptidoglycan), while slime molds have cell walls containing (silica, peptidoglycan or chitin). diatoms are (chemoheterotrophs, photoautotrophs or chemoautotrophs) because they make food through photosynthesis, while slime molds are (heterotrophs, phototrophs or autotrophs) because they eat decaying plant matter.