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Definition
animals that have a backbone |
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Definition
| animals without a backbone |
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Definition
| warm-blooded vertebrates that includes humans and other animals that feed their young milk |
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Definition
| warm-blooded egg-laying vertebrate animals with the body covered with feathers |
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Term
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Definition
| cold-blooded vertebrate animals that can live both on land and in water |
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Term
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Definition
| a cold-blooded vertebrate animal with a scaly body, fins, and that lives and breathes in water |
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Term
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Definition
| any cold-blooded air-breathing vertebrate that usually lays eggs and has skin covered with scales or bony plates |
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Term
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Definition
| change in an organism or its parts that fits it better for the conditions of its environment |
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Term
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Definition
| the young of a person, animal, or plant |
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Term
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Definition
| an organism that is no longer existing |
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