I believe the nuclear membrane
        
             
        
        
        
The horse and mouse are endotherms among them rat will have high mass-specific metabolic rate.
The shark and fish are endotherms among them fish will have high mass-specific metabolic rate.
Explanation:
The endotherm (heat requires in them to maintain internal temperature of the body) organism have high metabolic rates to maintain homeostasis, this requires the large amount of energy. Smaller animals have the greater surface area to volume ratio, hence more heat loss and higher metabolism. In larger animals body volume increases, surface area increase is also very slow, hence less heat loss and lower Metabolic rate. Smaller animals exchange oxygen to tissues at a high rate.
Same goes with ectotherms the larger the animal the smaller is the metabolic rate. During winters their activity slows down as they cannot adjust with the temperature of the surrounding.
However metabolic rates of ectotherm and endotherm cannot be compared.
 
        
             
        
        
        
The answer is b I'm positive 
pls give brainliest answer
        
                    
             
        
        
        
Yes they do without it they could not produce protein.
        
             
        
        
        
The central nervous system is made up of mainly the brain and the spinal cord while the peripheral nervous system is divided into two types which are sensory and motor neurons. The somatic nervous system is associated with voluntary nerves while the autonomic nervous system is also known as involuntary nervous system. The sympathetic nervous system increases or speeds up a process while the parasympathetic nervous system decreases or slows down a process.