Answer:
the answer is b. muscular walls of the arteries
Explanation:
 
        
             
        
        
        
The ozone later; chlorofluorocarbons
 
        
                    
             
        
        
        
When Denise mixed the blood with water, it formed Osmosis. There is water in the blood as well as a concentration of salt.
        
                    
             
        
        
        
I believe your Answer would be:
A: Sister Chromatids.
Explanation:
A sister chromatid refers to the identical copies (chromatids) formed by the DNA replication of a chromosome, with both copies joined together by a common centromere. In other words, a sister chromatid may also be said to be 'one-half' of the duplicated chromosome.
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