The protein would come denatured, losing its shape , and would not be able to function properly 
        
                    
             
        
        
        
Cold blooded, lay eggs in water, and respire both by skin and lungs, and they have a three-chambered heart. 
        
             
        
        
        
Answer:
B Physical separation of populations prevents  interbreeding and mixing of gene pools.
Explanation:
Geographic isolation means two populations are unable to reproduce with one another. This means that over time, the variation in the gene pool will be different for one group compared to the other, and the species will genetically diverge from one another. resulting in speciation. 
 
        
             
        
        
        
Answer:
B
 Mutation is the ultimate source of genetic variation, but mechanisms such as sexual reproduction and genetic drift contribute to it as well Because prokaryotes are haploid, such a mutation immediately become part of the genetic makeup of the cell unlike eukaryotic diploids where a normal second copy of the gene usually protects the cell from the potentially lethal effect of such a mutation.