Which of the following is considered a scientific theory?

Radioactive dating of fossils depends on the decay of

A species is a group of similar organisms that can

One of the main ways by which new species form is through

Most fossils form when they become buried in

An adaptation is any trait that helps an organism

The technique that allows scientists to determine the actual age of a fossil is called

Which of the following is a type of evidence used by scientists to determine evolutionary relationships?

On the Beagle, Charles Darwin’s job was to

A fossil made of hardened minerals in the shape of the original organism or one of its parts is called a(n)

A diagram that shows how different groups of organisms are related is called a(n) ___________.

The _______________ of a radioactive element is the time it takes for half of the atoms in a sample to decay.

Evolution occurs by means of a process called ________________________.

The author of The Origin of Species was ________________________.

A species is ________________________ if no members of that species are still alive.

Any difference between individuals of the same species is called a_______________________ .

The millions of fossils that scientists have collected make up the ___________.

Only traits that are ____________an be acted upon by natural selection.

Related species have similar body structures because they inherited the same genes from a common ___________.

When a hard part of an organism buried in sediment dissolves and leaves an empty space, the result is called a __________.

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