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.
 
        
             
        
        
        
The transition directly from a solid to a gas
        
             
        
        
        
I believe hypothesis .
Please vote my answer brainliest. thanks!
        
             
        
        
        
Because it has no scientific explanation. As a matter of fact it has no explanation.
The things that black cats cause bad luck are a myth, and do not have any proof or explanation, meaning it cannot be concluded neither as a hypothesis nor scientific.
Hope it helped,
BioTeacher101
 
        
             
        
        
        
The scientist that discovered cells by observing cork with a homemade microscope would be Robert Hooke.