Alagae is a primitive form of life, a single-celled or simple multiple-celled organism that is able to conduct the process of photosynthesis. It is generally found in water, but can also be found elsewhere, growing on such surface as rocks or trees. The various type of algae are classified according to pigment.
Characteristics of algae:
1. Blue-green algae, or Cyanophyta, can grow at a very high temperature and under intensity of light. This type of algae is the oldest form of life with photosynthesis. Fossilized remain of blue-green algae more than 3.4 billion years old have been found in parts of Africa.
2. Green algae, chloropyta, is generally found in fresh water. It reproduces on the surface of a enclosed bodies of water such as ponds or lakes and has the appearance of a fuzzy green coating on the surface of the water.
3. Brown algae, or phaeophyta, grows in a shallow, temperate water. This type of algae is the largest in size and most recognizable as a type of seaweed. Its long stalks can be enmeshed on the ocean floor, or it can float on the ocean's surface.
4. Red algae,rhodophyta, is a small delicate organism found in the formation of coral reef:it secretes lime from the sea to foster the formation of limestone deposits.
Tidak ada komentar:
Posting Komentar