Answer:
overreacts to an antigen
Explanation:
Allergies to substances are as a result of immunological dysfunction. 
 
        
             
        
        
        
Answer:
One advantage is that secual reproduction provide variation which can help living things survive in different environment. Asexuals cannot have variation.
Explanation:
 
        
                    
             
        
        
        
Answer: from an easily identified and confined place.
 
4. Give examples of point source pollution. The classic image of a factory smokestack belching smoke and fumes into the air or an industrial discharge pipe pouring contaminated liquid into a river are some great examples of point source releases to the environment.
5. What is non-point source pollution? Non-point source (NPS) pollution is pollution resulting from many diffuse sources, in direct contrast to point source pollution which results from a single source.
Explanation: