Answer:
phototropism
Explanation:
phototropism is the plant responding to external stimuli, in this case the sun.
 
        
                    
             
        
        
        
Answer:
<em>Open </em><em>circulatory </em><em>system</em><em> </em><em>is </em><em>the </em><em>system </em><em>that</em><em> </em><em>is </em><em>primarily</em><em> </em><em>found </em><em>in </em><em>invertebrates.</em>
 
        
             
        
        
        
The answer would be B. as ribosomes are in charge of translating mRNA to polypeptides and thus proteins. (In this case osteoid and various hormones)
 
        
                    
             
        
        
        
Because they need it to get protein and create it. Protein helps the plants grow.