Change over time

The environment selects the fittest organism.

An organism's ability to survive and reproduce.

A trait that helps an organism survive.

The interactions of the living and nonliving environment.

Living parts of an ecosystem.

Nonliving parts of an ecosystem.

A group of organisms of the same species living together.

Organisms that can reproduce with each other.

Many populations living together in an ecosystem.

Several ecosystems with similar climates.

Physical features of environment: temperature, precipiataion, etc.