OK the the answer you are looking for will be the excretory system because that is the system that releases waste.
        
                    
             
        
        
        
<span>1 ATP molecule allows 3 Na+ to move out of the cell 
and 2 K+ to enter.
 So 50 ATP molecules allow 150 Sodium ions to move out and it allows 100 Potassium ions to move in
so  correct option is C 
hope it helps</span>
        
             
        
        
        
Answer:
The answer is A. The cell membrane provides rigid support and protection for the cell
Explanation:
The semipermeable structure that surrounds the cell helps the cell live in different environments
 
        
             
        
        
        
The development of a new species is called speciation
hope this helped
 
        
             
        
        
        
Explanation:
Endogenic forces work towards the middle of the earth...creating pressure causing cracks, pits..