Natural Selection BrainPOP

What is least likely to be an example of a variation within a species?

Number of limbs

The Galapagos Islands are where Charles Darwin:

Studied unusual animals

Which variation would be most likely to benefit any organism, regardless of environment?

The ability to produce energy more efficiently

The beaks of finches found on various Galapagos Islands differed based on:

The available food supply

In the phrase "survival of the fittest," the term "fittest" refers to:

The best-adapted organisms

Dogs are an example of:

selective breeding

Which of the following is an example of an environmental pressure?

A lake that's gradually running out of water

What is a common ancestor?

An animal from which two or more different species evolved

When nature "selects" a variation, that means that the trait:

Gets passed along from generation to generation

On Darwin's tree of life, organisms at the base of a branch:

Give rise to species farther down the branch