Answer: Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene's protein. ... And when the amino acids of a protein stay the same, researchers believed, so do its structure and function.
 
        
             
        
        
        
Answer:
because of how much water is in the ocean
Explanation:
there is so much water in the ocean, and 100 degres isnt quite boiling point. and the ocean is so big that even if there was one part of the world where it got hot enough boil and possably evaporate, the colder parts of the world still wouldnt.