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.
Metabolism is a combination of chemical reactions that are spontaneous and release energy and chemical reactions that are non-spontaneous and require energy in order to proceed. Living organisms must take in energy via food, nutrients, or sunlight in order to carry out 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.