Evolution can be defined as-

• the gradual change of a species over a long period of time.

• a modification that gives the species an advantage for survival.

• the permanent loss of a species.

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Many fish and reptiles are cold-blooded in order to survive living in cold-water environments. This is an example of an __________ because it is a modification that gives the species an advantage for survival.

• adaptation
• evolution

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Camels store fat in their humps to deal with the lack of water in the dry, sandy desert. The adaptation in this example was-

• Camels need food and water.

• The desert has very little water.

• Camels store fat in their humps.

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Large marine mammals like whales live in the ocean full time, but they need to breathe air. The whales have become very good at holding their breath underwater. The adaptation in this example is-

• Whale live in the ocean full time.

• Whales need to breath air.

• Whales can hold their breath underwater.

Sea creatures like the squid have a marvelous defense to warn off enemies. If there is an enemy, the squid puts ink in the water! The adaptation in this example is-

• squid wants dinner.

• squid puts ink in the water.

• the enemy puts ink in the water.

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Evolution is change that occurs over a very short period of time.

• TRUE

• FALSE

In the process of evolution, organisms without the adaptation do not survive.

• TRUE

• FALSE

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Evolution begins with a change in the environment.

• TRUE

• FALSE

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Evolution is complete when millions of years later, a new species has evolved.

• TRUE

• FALSE

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This picture shows ___________ __________ that are structurally similar but have a different functions.

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