Answer: Some mutations have a positive effect on the organism in which they occur. They are calledbeneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur
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Answer:
hello can you follow me 
Explanation:
In think option B is correct 
 
        
                    
             
        
        
        
Answer:
A snake, depending on species if snake can live in the cold
Explanation:
If not that snake compatible for that weather it will die in a matter of time before death
 
        
             
        
        
        
Answer:
Explanation:
i would say bear/hawk as it has no natural predators and eats bot herbivores and omnivores  
 
        
             
        
        
        
Answer:
Positive Regulation of the Cell Cycle
Two groups of proteins, called cyclins and cyclin-dependent kinases are responsible for the progress of the cell through the various checkpoints. 
Hope this helps you