Feedback is when the body reacts in the same direction as a stimulus.
negative
positive

What is the empirical formula for c4h8o2

Why do cells appear different in distilled water than they do in 10% salt water?

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?