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.
Renewable energy sources are important to the planet because the sources we use for energy will eventually run out.Also these energy sources contribute to global warming. Ren â¦ ewable means that it can be reused and in this case, it means it is infinite like air or water.enewable energy sources are important to the planet because the sources we use for energy will eventually run out. Also these energy sources contribute to global warming.