A. the amount of lean muscle in a body 
        
                    
             
        
        
        
Dominate and no know preditors <span />
        
                    
             
        
        
        
Answer: The answer is D) Subjects are awakened at the same time everyday. 
Explanation:
Its right. 
 
        
             
        
        
        
Neuroglia<span>, which is sometimes referred to as "</span>glia", are cells that are not neurons but merely support and provide protection for neurons. They are called 'non-neuronal cells' and they exist<span> in the </span>central nervous system<span> (</span>brain<span> and </span>spinal cord<span>) and the </span>peripheral nervous system (nerves outside the brain and the spinal chord).