A group of individuals of the same species that live together in the same area at the same time.

To find their way from one place to another.

An inherited trait that improves an individual’s ability to

survive and reproduce in a particular environment.

The process by which organisms with certain traits survive and

reproduce at a higher rate than organisms without these traits.

The human practice of breeding animals or plants that have certain desired traits.

The number and variety of organisms in a given area during a specific period of time.

To travel from one place to another.

The response or reaction of an animal to a situation perceived as a threat to its survival, which involves changes in the animal’s body through actions of the nervous system, priming the animal to deal with

danger by staying, fighting, or running away.

A period of reduced activity that some animals undergo during summer when resources are scarce.

A period of inactivity and lowered body temperature that some animals undergo in winter.

An aid that is used to identify organisms and that consists of the answers to a series of questions.

The maintenance of a constant internal state in a changing

environment.