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.
Not all marine organisms do live near the surface of the ocean, but those marine organisms that are producers (those that photosynthesise) do and they do so because to photosy â¦ nthesise they need to live in the surface layers where sunlight can penetrate because at depth the oceans are dark.ater is the most important part in an living organism. our body is made up of 70% water and it helps the blood flow regular to our body parts. Every cell in the human body â¦ needs water because many of the body's processes, including chemical reactions, take place in water.