Answer:
As the variables are not given, let us help with general explanation on manipulated variable.
Explanation:
A manipulated variable is an independent variable. In a scientific experiment, an independent variable can be described as a variable which can change naturally or which is changed by the researcher to check its effect on the dependent variable. The dependent variable is the variable which is under study and being tested. 
For example, to check the difference in photosynthesis rate by light, the amount of light will be the independent variable and the rate of photosynthesis will be the dependent variable.
 
        
             
        
        
        
As ribosomes make their proteins, they may attach to the rough ER and insert the protein into the interior of the ER. The ER then begins folding the new proteins and transports them to areas in which chemical processing takes place
        
                    
             
        
        
        
Answer:
Deliver water, nutrients, amino acids, etc to the rest of the plant, and afir machanical supoort
 
        
             
        
        
        
Should there be answer choices that go with this question?
If not here is an answer that may help.
This is how the cycling between photosynthesis<span> and cellular respiration occurs: </span>in photosynthesis<span>, carbon dioxide and water, </span>in<span> the presence of light energy, are converted to make glucose and oxygen.</span>