oxygen cycle summary

Oxygen Cycle - Oxygen is another essential element for living organisms. It is present in large quantities (20.95% v/v) in the atmosphere and is also seen in bound state in water and as oxides and carbonates in rocks. Dissolved oxygen in water is the source o..

Oxygen is another essential element for living organisms. It is present in large quantities (20.95% v/v) in the atmosphere and is also seen in bound state in water and as oxides and carbonates in rock..

The biotic and abiotic components form an interacting system called 'ecosystem'. Producers, consumers and decomposers are the various trophic levels, which are linked by their food relationship forming a 'food chain'. Several food chains are interrelated and interconnected to form a network called ..

The basis of life on earth is atmospheric cover on earth and natural cycles like carbon, oxygen, nitrogen and hydrological cycles. Atmosphere is evolved in its present form due to sunlight and rotation of earth on its axis. Many environmental changes like chang..

>When nitrogen is heated with calcium carbide at 800 o C to 1000 o C, nitrolim an important fertilizer is formed. Nitrogen is used in high temperature thermometers, as a refrigerant and in electric bulbs. Nitrogen cycle charts the circulation of nitrogen compounds in n..

According to the modified cell principle, new cells arise only from pre-existing cells. Cells transfer their genetic information only by way of cell division. The mode of cell division is largely the same in all living organisms indicating the unity of life. Cell division becomes necessa..

The molecular mechanism by which a gene shows to potential in the phenotype of an organism, is called gene expression. Every gene contains the blue print required for the function of a given polypeptide, in the form of a specific sequence of nucleotides. The transfer of a code present in th..

The circulatory systems circulate nutrients, wastes and metabolic intermediates and heat uniformly through out the body. Advanced animals carry blood as the circulating fluid and a circulatory system with the heart and blood vessels to conduct the blood. In invertebratessuch as insects, the bl..

. Human heart is four chambered. There are two receiving chambers, the auricles and two pumping chambers, the ventricles. The right side of the heart is concerned with deoxygenated blood and the left side is concerned with the oxygenated blood. The pumping action results in a sequence of ..

Nitrogen Cycle - Nitrogen is an important structural component of many necessary compounds, particularly proteins. Atmosphere is the reservoir of free gaseous nitrogen and nitrogen compounds are found in bodies of organisms and in the soil. Living organisms cannot pickup elemental gaseous..