EOC Standard 6 (Ecology) Practice

Place the levels of ecological organization in correct order.

Organism to _______ to ________ to _______ biosphere.

• population; community; ecosystem

• ecosystem; community; population

• population; ecosystem; community

• community; population; ecosystem

Biotic factors are the _____ parts of the environment.

• living

• nonliving

Abiotic factors are the _____ parts of the environment.

• living

• nonliving

An interaction between species in which one species eats the other.

• predation

• competition

• mutualism

• commensalism

A relationship that occurs when two or more organisms need the same resource at the same time.

• predation

• competition

• mutualism

• commensalism

An organism's ecological home.

• habitat

• niche

An organism's ecological occupation.

• habitat

• niche

Competition usually results in a decrease in the population of a species less adapted to compete for a particular resource.

• true

• false

A symbiotic relationship exists between organisms of two different species that live together in direct contact.

The host organism is harmed in which relationship?

• mutualism

• commensalism

• parasitism

A symbiotic relationship exists between organisms of two different species that live together in direct contact.

At least one species benefits in which relationship?

• mutualism

• commensalism

• parasitism