Ecology Review

Which of the following is a biotic factor in the prairie ecosystem?

• Water

• Sunlight

• Soil

• Grass

The place where an organism lives and that provides the things the organism needs is called its

• habitat.

• population.

• species.

• community.

The smallest unit of ecological organization is a single

• population.

• community.

• organism.

• ecosystem.

Which of the following is an example of a population?

• the cats and dogs in your neighborhood

• the bushes and grass in a park

• the rocks in a rock collection

• the gray wolves in a forest

A group of antelope leaving the herd in search of a better grassland is an example of

• immigration

• emigration

• increasing birth rate

• decreasing birth rate

The largest population that an environment can support is called its

• carrying capacity.

• limiting factor.

• birth rate.

• death rate.

The struggle between organisms to survive in a habitat with limited resources is called

• competition.

• predation.

• symbiosis.

• parasitism.

When a jellyfish paralyzes a tiny fish with its poisonous tentacles, the fish is

• predator

• prey

• host

• parasite

A close relationship between two species that benefits at least one of the species is called

• natural selection

• symbiosis

• adaptation

• competition

The Escherichia coli (E-coli) that live in your intestine and help break down food are an example of which type of interaction?

• competition

• mutualism

• parasitism

• predation