A gradual change in the species composition of a community over time is termedMultiple choice question.succession.species richness.species evenness.commensalism.

A close and often lifelong ecological relationship between species is calledMultiple choice question.succession.species richness.a keystone.a symbiosis.

is the gradual change in the types of species that live in a community. This can include primary and secondary situations.

Members of the same species that inhabit the same area are called aMultiple choice question.habitat.community.population.niche.

Succession occurs whenMultiple choice question.a keystone species is removed.one species is harmed while another benefits.a chemical becomes more concentrated in organisms at higher levels in the food chain.a community's species composition gradually changes over time.

Genetic change in one species that selects for subsequent change in the genome of another species is calledMultiple choice question.succession.parasitism.cycling.coevolution.