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.
Cells need energy to perform processes in order to sustain life. In plants, energy from the sun is needed for photosynthesis, a process which allows the plant to create glucosâ¦e for food. Animals then get their energy from plants and other animals and convert this energy into ATP energy for processes like cellular respiration and protein synthesis. All these processes require energy and work together to keep the organism alive.