Darwin's Theory

To understand how evolution might occur, Darwin studied the offspring of ___ animals that were produced by artificial selection.

domesticated

The process of change over time is called ____.

evolution

Members of a species can mate with each other and produce ______.

fertile offspring

The preserved remains of an organism that lived long ago is a _____.

fossil

A scientific ____ is a well-tested concept that explains a wide range of observations.

theory

Differences between members of the same species are called _____.

variation

Without ____, all members of a species would have the same traits.

variation

Today scientist know that organisms are ____ diverse than Darwin imagined.

much more

The process by which individuals that are better adapted to their environment are more likely to survive and reproduce is called ___.

natural selection

In 1858, ____ proposed an explanation for how evolution occurs

Alfred Russel Wallace and Charles Darwin

What did Charles Darwin do on the Beagle's five-year voyage around the world?

As the ships naturalist, Darwin collected samples and made observations of living things from different areas of the world.

Darwin made a number of important observation on the ____ Islands.

Galapogos

In Darwin's book, ____, he proposed that evolution occurs by means of natural selection

The Origin of Species

A ___ is a trait that helps an organism survive and reproduce.

adaptation

The different shapes of bird beaks are examples of ___.

adaptation

Only the organism with a desired characteristic are bred in ____.

artificial selection