Nucleic acids are made up of nitrogen bases, sugars, and phosphates.
        
             
        
        
        
The two subjects are both dealing with flesh, the human skin
        
             
        
        
        
Genetic change in the reproductive cells of the body (ovule or sperm) that is incorporated into the DNA of each cell in the body of the descendants. Hereditary mutations are transmitted from parents to children. It is also called germline mutation.
        
             
        
        
        
Answer:
The correct answer is D.
Explanation:
The Amoeba Proteus example given in the question describing its engulfing smallar organism and digesting them is an example of a proces named "Phagocytosis". These cells are called phagocytes and the process can be used for both feeding purposes or defensive purposes by various cells. I hope this answer helps.