Phosphorus is one of the most important constituent of several important compounds always present in organisms. It occurs both in organic (nucleic acids, nucleoproteins, phospholipids, etc.) and inorganic (phosphate) forms in the living organisms. Animals possessing bones have large amount of phosphorus in its inorganic form. However, phosphorus is added to soil through chemical fertilizers, excrete and organism- residues. Though [...]
In this article we will discuss about the carbon cycle with the help of diagram. Carbon is the most important element in the biological system and constitutes about 50% of all living organisms. Carbon dioxide present in the atmosphere or dissolved in water is the ultimate source of organic carbon compounds occurring in nature; its complete cycle is schematically represented [...]
In this article we will discuss about the nitrogen cycle with the help of diagram. Nitrogen forms the main bulk of the atmosphere (78%) as well as the biological systems. Various nitrogenous compounds, e.g., proteins, enzymes, chlorophylls, nucleic acids, etc. play vital roles in the life processes of organisms. The atmospheric nitrogen is chemically inert and is not directly taken [...]