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Lessons 1+2

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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Term
Definition
homeostasis   keeping internal body conditions stable  
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adaptation   structures and behaviors that allow animals to preform there functions  
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vertabrate   animals with a backbone  
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invertabrate   animals without a backbone  
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tissue   a group of similar cells that preforms a specific function  
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organ   made up of different tissues  
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radial symmetry   if many imaginary lines can be drawn through a central point to divide it into two mirror images  
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bilateral symmetry   if only one imaginary line can be drawn to divide it into halves that are mirror images  
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Created by: lindsaylewiss
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