87th 88th article: introduction to algae for senior high school

The Algae are primitive forms. They are generally live in water, but can also grow on such as rocks or trees under water. The various type of algae are classified according to pigment. There are blue, green, brown,  and red algae. They secrette lime from the sea water to foster of the information limestone deposits. The algae can grow at a very high temperature and under high intensity of light.