A species is a group of similar organisms that

What did Darwin infer from his observations of organisms in South America and the Galápagos Islands?

Differences between members of the same species are called

Which of these is one of the main ways that a new species forms?

What are fossils?

Which term refers to similar structures that related species have inherited from a common ancestor?

If two organisms look very similar during their early stages of development, this is evidence that the organisms

A branching tree, or cladogram, is

Scientists combine evidence from fossils, body structures, early development, DNA, and protein structures to

What did Darwin observe about finches in the Galápagos Islands?

A trait that helps an organism survive and reproduce is called a(an)

The gradual change in a species over time is called

Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?

Which term refers to a species creating more offspring than can possibly survive?

What evidence suggests that the ancestors of whales once walked on land?

Darwin concluded that organisms on the Galápagos Islands

Which of the following BEST describes the effect that natural selection might have on a species over time?

Which of the following most likely supports how giraffes evolved long necks?

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