Ais a membrane-bound sac found in cells that contains digestive enzymes which break down complex molecules or structures.

Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations