Cold sores - painful sores on the lips and around the mouth, caused by a virus. Canker sores - painful sores in the mouth, caused by bacteria or viruses. Thrush - a yeast infection that causes white patches in your mouth. Leukoplakia - white patches of excess cell growth on the cheeks, gums or tongue, common in smokers.
Energy and Metabolism. All living organisms need energy to grow and reproduce, maintain their structures, and respond to their environments. Metabolism is the set of life-sustaining chemical processes that enables organisms transform the chemical energy stored in molecules into energy that can be used for cellular processes.
Essay titles 1. The process of diffusion and its importance in living organisms. 2. The different ways in which organisms use ATP (June 2002) OR ATP and its roles in living organisms.3. The movement of substances within living organisms (Jan 2003) OR Transport mechanisms in living organisms.4. Mutation and its consequences. 5.he different ways in which organisms use ATP (June 2002) OR ATP and its roles in living organisms. 3. The movement of substances within living organisms (Jan 2003) OR Transport mechanisms in living organisms. 4. Mutation and its consequences. 5.