DNA methylation is a process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the sequence. When located in a gene promoter, DNA methylation typically acts to repress gene transcription.
        
             
        
        
        
Explanation:
A hypothesis is defined as an educated guess , while a research question is simplify a research wondering about the world .
 
        
             
        
        
        
0B)21% that’s your answer
        
             
        
        
        
Answer:
Explanation:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.