<span>The production of red blood cells, which transport oxygen, is triggered by a low level of oxygen in the blood.  is correct.</span>
        
             
        
        
        
Answer:
It would be the plant type
Explanation:
This is because you are measuring the growth of 2 different plants, so they can not be the same. all the other options ARE constants 
 
        
                    
             
        
        
        
Diffusion and osmosis to get the minerals in and the pholem uses diffusion to transport all parts of the plant body
        
             
        
        
        
And if and because or up down and below or above or beneath
        
             
        
        
        
The first one is to absorb calcium. 
second question: I THINK poor wound healing