Answer:
The answer to the first one is B. A mechanism for the evolution of a population to become better adapted to their environment over many generations. 
The answer for the second one is C.vestigial 
Explanation:
 
        
             
        
        
        
True
You can’t skip any step; you need to do each step in order.
        
                    
             
        
        
        
Answer:
The correct answer is A. transplanted organs contain antigens that can trigger white blood cell activity
Explanation:
The body's immune system is designed to seek out and destroy any foreign object it finds in the body, such as a cold or flu virus - or a transplanted organ. The process of destruction of the transplanted organ is called rejection.Immunosuppressive drugs will be provided to prevent your immune system from damaging the transplanted organ. Organ transplants require the use of immunosuppressive drugs capable of controlling the immune response triggered by the presence of antigens foreign to the body itself. The group of immunosuppressants is made up of drugs indicated both in the prevention of rejection of the transplanted organ and in its reversal.
 
        
             
        
        
        
Answer:
Heredity.
Explanation:
Heredity refers to the traits or characteristics that is passed genetically from the parents to the offsprings or passed from one generations to another. It can be through sexual or asexual reproduction.
Heredity play role in our behavior, personality and mental processes because these all are determined by the traits or characteristics we inherited from our parents.