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| A class of animals with soft bodies and a muscular foot, which is used for moving. Many, such as snails, also have a shell. |
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| Black spot on the side of the body of a female fish. |
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| A stage in the life cycle of some organisms, A catepillar is one. |
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| A dark line, running the length of a fish |
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| An animal that gives birth to live, fully formed offspring |
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| A structure that lines the shell of shell-bearing animals. This has glands that produce the material from which new shell is made. |
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| A tonguelike organ that has tiny teeth that break down an animals food into bits. A snail has one. |
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| an organism that eats dead decaying organic matter. Also known as decomposers. |
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| A long thin organ that an animal uses for felling, feeding, or grasping. |
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