The boundary separates them<span />
        
                    
             
        
        
        
Plants maintain homeostasis by keeping their stomata open just enough to allow photosynthesis to take place but not so much that they lose an excessive amount of water. 
When plant cells use the food they make, the cells respire, taking in oxygen and giving off carbon dioxide.
- Hope this helps
 
        
             
        
        
        
Answer:
How everything on the earth are interconnected.
Explanation:
 
        
             
        
        
        
Answer:
C.
It is able to regulate the flow of the calcium oxide and water into the food to make it warm.
Explanation:
 
        
                    
             
        
        
        
Answer:
D. A silent variant near the 5' end of the TBX1 gene. 
Explanation:
TBX1 gene is wild type human being. It gives instructions for making protein called T-box 1. It plays an important role in tissue formation and organs during embryonic development.