Ecosystems 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

An organism’s particular role, or how it makes its living, is called its

• carrying capacity.

• ecosystem

• competition

• niche

The behaviors and physical characteristics of species that allow them to live successfully in their environment are called

• habitats

• limiting factors

• biotic factors

• adaptations

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 the

• 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 that live in your intestine and help break down food are an example of which type of interaction?

• competition

• mutualism

• parasitism

• predation