Rapid evolution with a few intermediate forms

A trait that makes an individual different from others of its species

Evolution as a result of acquired characteristics is

Survival of the fittest

Telling age by the amount of change in a radioactive element

Evolution as a slow change of one species to another

Study of the development of the embryos of organisms

When an organism blends into its environment

A (n) _________ is a group of organisms that look alike and can reproduce among themselves.

Mutations that are NOT HELPFUL usually

A variation that is helpful to a species is called a(n)

Evolution is a ____________ process.

This theory states that species change little for a long period of time then, during a relatively short period of time, under significant change resulting in a new species.

This theory states that a continuing series of small variations will result in a new species over time.

Which of the following is NOT one of the 5 principles of natural selection?

The Theory that organisms with traits best suited to their environment are more likely to survive and reproduce.

An inherited trait that makes an organism different from others of its species

__________________ states that characteristics developed during an organism's lifetime can be passed down to its offspring.

A change in the inherited characteristics of an organism over time is __________________________.