Answer:
D is the correct answer. (please give me brainliest?)
 
        
                    
             
        
        
        
Answer:
It means that from time to time, organisms change in form and function 
Explanation:
As organisms live, they change and develop/mutate into better, stronger, and more functional creatures. This is in addition, because of the cells in the body.
 
        
             
        
        
        
This is True . the reabsorption through the proximal tubule is obligatory 80% whereas water reabsorption through distal tubule is facultative but mostly through collector tubules 15 % ( under the action of aldosteron and antidiuretic hormone).