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Fishes

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
fish   vertebrate that lives in water and uses fins to move  
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cartilage   tissue that is more flexible than bone  
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swim bladder   internal, gas-filled sac that helps the fish stay stable at different depths in the water  
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forked   having two branches; divided; split  
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propel   to push forward  
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lure   to attract  
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ectotherm   animal whose body does not produce much internal heat  
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receptor   sensor for feeling things  
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captivity   confined place out of the wild  
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Created by: Mills, Susan
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