cyanobacteria organisms

The micro-organisms like cyanobacteria (blue-green algae) and photosynthetic bacteria can also fix nitrogen. Some cyanobacteria also act as symbionts and are present in association with lichens; liverwort - Anthoceros; fronds of water fern - Azolla and roots of a gymno..

Organisms that synthesise, food with the help of the light energy of the sun, carbon dioxide and water by a process called photosynthesis are called photoautotrophic organisms. For example: Cyanobacteria (blue-green bacteria, prokaryotes), algae and all green plants. ..

Photoautotrophic organisms synthesize food with the help of light energy of the sun, carbon dioxide and water. The process of synthesis of food in this method is called photosynthesis, which will be dealt later in this chapter. For example: cyanobacteria (blue-green bacteria, ..

Summary - Earth is said to have been formed about4.8 billion years ago. Earliest earth was a hot revolving ball of gas. The formation of first cells in planet earth is explained by the theory of chemical evolution proposed by Oparin and Haldane, independently. According to this theory, the reducing..

They evolved 3300 to 3500 million years ago. They were like present day cyanobacteria and could release O 2 into the atmosphere because they used water as the reagent. Thus, the whole reducing atmosphere changed to an oxidising atmosphere. Autotrophs are said to have arisen much later i..

There are two basic types of cells found in living organisms - the prokaryotic cells and the eukaryotic cells. This classification is based on three main features, namely; Organisation of biomembranes Nature of cytoplasmic organelles and Arrangement of the nuclear material The prokaryotic..

Temperature is one of the essential and changeable environmental factors. It penetrates into every region of the biosphere and profoundly influences all forms of life by increasing or decreasing some of the vital activities of the organism. It is frequently a limiting factor for the growt..

In the modern system of classification, living organisms are grouped under five kingdoms, as proposed by Whittaker (1966). The Kingdom Monera includes bacteria and blue green algae, both of which possess prokaryotic cells. Bacteria are unicellular prokaryotes that have a wide dist..

a) Plankton stage Germination of encysted spores in the newly formed water body forms the pioneer community, Spores could have reached the water body through wind or animals. Planktonic stage includes minute autotrophic diatoms, phytoflagellates, cyanobacteria etc. Population of phytopl..