The fossil record shows a sequence from simple bacteria to more complicated organisms through time, it is very reliable because it is physical evidence and by studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.
        
             
        
        
        
The answer is B. they embody the idea of descent with modification.
        
             
        
        
        
Answer:
D. Establish monitoring procedures
Explanation:
 
        
             
        
        
        
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