This would be considered a mutation. 
        
             
        
        
        
Dopamine int the frontal lobe area of the brain is responsible for controlling the flow of information from the other areas of the brain. Dopamine disorder in the frontal lobe can cause a decrease in neurocognitive functions such as memory, attention span and problem solving ability.
Sal is at risk of experiencing schizophrenia disorder.<span />
        
             
        
        
        
Answer:
Their Cell walls
Explanation:
Bacteria has a cell made up of peptidoglycan
Archaebacteria has a cell wall made of various compounds)
Their rRNA is different, so different taht tehy are placed on different part of the evolutionary tree.
 
        
                    
             
        
        
        
Water, air, food. and heat.
        
             
        
        
        
Not sure what the choices are but a biotic factor is anything living.