The answer is D. An irritant that because embedded in the mantle
        
             
        
        
        
Answer:
Exocytosis. 
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life. A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells. Generally, cells have the ability to independently replicate themselves. In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles
Exocytosis can be defined as a process which typically involves a cell releasing a large amount of a material (bulk transport) outside of the cell, using vesicles.
This ultimately implies that, exocytosis is a process in which living organisms release or expel large amount of unwanted material through the use of vesicles. Vesicles are cell organelles that ensure materials are properly transported to the right and exact location.
Additionally, exocytosis is a process initiated by the Golgi apparatus because it prepares the material for export by chemically tagging them. 
 
        
             
        
        
        
Soo whats the question??????
        
             
        
        
        
Answer:
The first part of finding out Lucy having ADA-SCID was when I realized there were no HIV proteins in her blood, getting rid of the possibility of her having HIV. Then, I realized she had a high number of Deoxyadenosine in her blood. This proves she has ADA-SCID because when the ADA doesn't work you find excess amounts of Deoxyadenosine in the blood.
Explanation:
 
        
             
        
        
        
The base sequence in the DNA is A=T
G=C