Answer:
the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms.
Explanation:
 
        
             
        
        
        
 The answer is B. Digestive and cardiovascular
        
             
        
        
        
Step 1. Simplify brackets

Step 2. Simplify
13
Done! :) 
Your answer is A. 13 Hope this helps!
 
        
        
        
They are prokyartic cells 
        
                    
             
        
        
        
Answer:
it's "True"
Mauna Loa is the most active volcano on Earth