"A. Mutations" is a factor in how a species can change over time. Natural selection selects these random mutations for survival based on how fit they make their host to the environment. 
        
             
        
        
        
Answer:
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The correct answer is fungi because fungi are organisms that survive on decomposing organisms
        
                    
             
        
        
        
Answer:
cells that should not invade other tissues do invade other tissues
Explanation: