human composition

Chemically the term alcohol refers to a group of organic compounds, having -OH group in their composition. But the word alcohol used by the common man refers to ethyl alcohol or ethanol. It has a variety of uses, especially as a solvent. But by far the greatest use of alcohol is in the f..

Soil pollution refers to addition of solid and liquid wastes to soil creating imbalance in its natural composition and functions. Both in rural and urban areas, the soil is being subjected to incessant pollution. Because, it is being forced to receive the pollutants from human a..

Pollution can be anything - which damages the ecosystem and destroys the delicate balance in the ecosystem. Thereby, it creates health hazards to human beings and animals besides damaging the ecosystem. For e.g., industries polluting air has set imbalance in composition of air a..

Air Pollution - Air is an important natural resource providing the basis of life on earth. Entire biosphere depends on air. Air in the atmosphere provides oxygen to plants and animals, by virtue of which they are able to live. The composition of air (78% N, 21% O, 0.03% CO 2 ) is necessar..

Change in the composition of air due to several human activities has brought about green house effect. Green house effect has brought about following phenomenal changes. The severity of these changes will aggravate further in the next 10-20 years. By 2040, CO 2 level in air is e..

The atmosphere resource of our world is unique and available to our planet only. No other planet is found to have similar atmosphere. Earth's atmosphere is a legacy from history of this planet. It was formed billions of years back. In the formative years, as the earth started cooling, it did not ha..

Water is the most abundant compound in the vast majority of cells. It forms about 60 to 90% of the total chemical content of the cell. Water accounts for about 65% of the chemical composition in the human body. In a jellyfish, the water content in the body is more than 95%! ..

This type of sex determination occurs in insects and mammals including human beings. Here, the females have two identical homologous sex chromosomes designated as XX and the males have two dissimilar sex chromosomes designated as X and Y. Thus, females are homogametic, producing only one ..

Accidents - Large area of forest catches wild fire accidentally. If not controlled in time by proper methods, fire grows out of proportion. In the last 5 years two major wild fires (in USA and Malaysia) are recorded. Each of them has sent an estimated 1.5 million tons of CO 2 to atmosphere. Over ye..

Soil is classified based on nature and composition. They are: Alluvial soil - rich in loam and clay Black soil - mostly made of clay Red soil - sandy to loam Mountain soil - stony, sandy soil Desert soil - sandy and poor in organic carbon Laterite soil - porous clay, rich in iron and alum..