<span><em>They tell us how life evolved and adapted to different environments and global changes throughout the Earth's development</em>
<em>                                Hope this helps:)</em>
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Answer:
no
Explanation:
they absorb our oxygen by the wind that blows so they can keep alive
 
        
             
        
        
        
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals
 
        
             
        
        
        
corn, (the rest of this i'm just filling out because answers must be a certain length)
 
        
             
        
        
        
Explanation:
Form temporary platelet plugs to stop bleeding.
Dissolve blood clots when they are no longer needed.