The answer is D. Transports fluids throughout the plant.:)<span>
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B pimples can last more than 2 days
        
             
        
        
        
Answer:
negative feedback
Explanation:
Insulin reduces blood sugars when the levels are high in the blood. The hormone  is produced by the pancreas and binds on receptors of cells. This initiates cell signaling mechanisms that signal the cell absorb sugars. When the blood sugars get back to normal, insulin production is reduced.