A plant leans toward a light source.
A because if they build a mall there the bear have no where to live and they would die out.
The clear fluid in the acne after it has been squeezed is that it has the role of exudating. It is the mass of cells in forms of fluid and the role of it in the wound is to help the wound to heal and clean when the blood vessel open the area, and after the fluid has been exudated, the nutrients and the oxygen that is needed by the wound would be brought by the blood of the individual.
The role of an enzyme is to B change the activation energy of the reaction. Specifically, they increase the general speed of all reactions and are made of proteins.
