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| eukaryotic cells that do not have cell walls. |
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| they cannot make their own food and must feed on other organisms to live |
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| Animals typically reproduce |
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| sexually, but some may also reproduce asexually |
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| Animals are able to respond quickly to |
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| external stimuli as a result of nerve cells, muscle or contractile tissue, or both |
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| Animal life cycles include |
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| a period of embryonic development |
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| cannot cut the body into two like halves |
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| any cut from the oral end to the other end through the center yields two like halves |
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| cut in ONLY ONE PLANE yields two like halves (right and left) |
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| Body plan becomes fixed as |
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| Get their nutrients from other organisms |
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