photosynthetic bacteria

The photoautotrophic bacteria possess photosynthetic pigments in membrane bound lamellae (or thylakoids) and utilise solar energy. The bacterial photosynthesis is different from that of green plants since here water is not used as a hydrogen donor. Hence oxygen is not release..

The process is the transformation of gaseous nitrogen into nitrates by living organisms. Biological nitrogen fixation occurs by: a) Symbiotic nitrogen fixation, which is brought about by certain bacteria such as: i) Rhizobium species in the root nodules of legumes (pea family) ii) Nostoc..

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. Organisms which synt..

="left">Chlorofluoro carbons (CFCs) Refngerators, air conditioners, foam shaving cream, spray cans and cleaning solvents. Destroy ozone layer which then permits harmful UV rays to enter the atmosphere. Nitrogen Oxides Automobile exhausts, burning of fossil fuels, forest fires,electric generation pl..