____________ is something that helps an organism survive.

___________ is a physical characteristic that hels an animal hide.

A major division of the geologic time scale that has many millions of years is ___________.

When the last member of a species has died, we say it is ____________.

The preserved traces and remains of an organism that lived long ago is ____________.

is the place where an organism lives.

An animal is said to _________ when it goes into a deep sleep to help it survive the winter.

An animal is said to ____________ when it moves to another region when seasons change.

_____________ is when an organism, or part of an organism, looks like another organism.

A _________ is an organism's place, or *job*, in its ecosystem that helps it compete with other organisms and survive.

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