Toxicology is the study of poison on living things
        
                    
             
        
        
        
Activational effect is the correct answer. 
Activational effect is an impermanent hormonal effect that leads to a change in physiological activity or behavior in both humans and adult animals. For instance, when testosterone levels rise in male songbirds they become more aggressive and tend to engage in courtship behavior. Also, a pregnant woman may get more emotional than usual due to an extra level of progesterone and estrogen during pregnancy.  
 
        
             
        
        
        
Answer:
The awnser is atoms
Explanation:
Atoms are the building blocks of everything.
 
        
             
        
        
        
Answer:
Answer is 2. Fibroblasts fail to divide. 
Explanation:
Tissue culture experiment is the experiment where tissues are grown in an artificial medium. This involves the use of growth medium such as agar or broth. This process help to produce needed tissues in a short period of time. 
Fibroblasts are cells which are found in the collective tissues, and they produce collagen. The collagen produced by the Fibroblasts play important role in tissue repair. Fibroblasts are regarded as the main cells in the connective tissue. 
Note that, PDGF, which is Platelet -derived growth factor in full, is a growth factor regulating cell growth and it's division. 
 
        
             
        
        
        
Delusions is a idiosyncratic belief or impression that is firmly maintained stating that they make false impressions on people
Some symptoms are irritable angry or a low mood also hallucinations