___ is the structure of a living thing.

• Anatomy

• Biology

• Biome

• Blubber

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___ structures are found on the inside of living things.

• External

• Internal

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___ structures are found on the outside of living things.

• Internal

• External

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___ are behaviors or physical characteristics that help an organism to survive and reproduce in its environment.

• Biomes

• Roots

• Nocturnal

• Adaptations

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A ___ is a community of plants and animals that have common characteristics for the environment in which they exist.

• camouflage

• biome

• adaptation

• nocturnal

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Leaves, bark, and flowers are ___ structures of plants.

• internal

• external

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The heart, brain, and stomach are ___ structures of animals.

• internal

• external

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Legs, claws, and wings are ___ structures of animals.

• internal

• external

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Heart, lungs, and brain are ___ structures of animals.

• internal

• external

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In the aquatic biome, fish have ___ for taking in oxygen and fins for movement.

• spines

• blubber

• gills

• fur

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