The answer would be B. Cats. 
Cats are the most advanced organisms between the options thus have the greatest amount of cell specialization. 
 
        
             
        
        
        
Answer:
Do you want a ligit answer or...
Explanation:
i will answer this, but youre gonna be scared if you ask me to do it.
  
        
                    
             
        
        
        
Answer:
Neurotransmitters
Explanation:
Neurotransmitters are the chemicals present in the body used for the propagation of action potential. These neurotransmitters are also known as the body chemical messengers.
Neurotransmitters are stored in the neural cells. These chemicals are generally released when the cell is stimulated by the specific signal. The effect of neurotransmitter may be excitatory or inhibitory.
Thus, the answer is option (4).
 
        
             
        
        
        
<u>Answer:</u>
<em>B. Many genetic diseases would be curable.
</em>
<u>Explanation:</u>
Gene therapy is intended to acquaint hereditary material into cells in order to compensate for faulty or mutated genes or to make a helpful protein. On the off chance that a faulty gene makes a beneficial protein be flawed or missing, gene therapy might have the option to present a typical duplicate of the gene to reestablish the function of the protein.  
A gene that is embedded straightforwardly into a cell as a rule doesn't work. Rather, a bearer or carrier called as a vector is hereditary built to insert the desired gene.