Aqa Biology Paper 1 Study Guide Rated A+

Muscle cells {Ans: These cells are long (so that they have space to contract) and contain lots of mitochondria to generate the energy needed for contraction}endothermic reaction {Ans: a reaction that requires a transfer of energy from the environment}large intestine {Ans: where excess water is absorbed from the food}vaccine {Ans: dead or inactive pathogenic material used in vaccination to develop immunity to a disease in a healthy person}Partially permeable membrane {Ans: A membrane that allows the free diffusion of some small solute molecules but not others}Stomata {Ans: Small openings on the underside of a leaf through which oxygen and carbon dioxide can move}