From what I can tell, The answer is either A or B. Mammals have what is called an Endoskeleton, which means that their skeletons are inside their bodies. A way to remember this is Exo- is similar to exit and when you exit something then you are going outside. Endo- sounds like into, which can relate to being on the inside. Insects have Exoskeletons, which are made from Chitin. Now Agonists are also called Prime Mover muscles, which means they are practically the same thing. 
        
             
        
        
        
<span>The correct option is: IT HELPS CARRY AN IMPULSE BACK TO THE NEXT NEURON. There are two types of neurons, excitatory and inhibitoty neurons. Both serve to transmit impulse from one point to the other. Each neuron usually makes several connections with other cells.</span><span />
        
                    
             
        
        
        
Hey! The answer is: Collect data using a prototype.
I have a screenshot attached as well.
I hope this helps you!
Good luck! :)
 
        
             
        
        
        
Answer:
when the sun and plant mix together in the cells to become that which also relates or lead up to glucise
Explanation: