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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..

The major problem that the atmosphere is being subjected to is pollution. In India, about 100 million tons of pollutants are being added to the atmosphere annually. This figure is likely to go up in future. Polluted air is harmful to man and the biosphere on the whole, as well. ..

Air Pollution - The major problem that the atmosphere is being subjected to is pollution. In India, about 100 million tons of pollutants are being added to the atmosphere annually. This figure is likely to go up in future. Polluted air is harmful to man and the biosphere on the ..

The right and the left auricles are separated by a fibrous partition called interauricular septum. Both the auricles have very thin walls because they have to push the blood only into the ventricles. The inner surface of the auricles is very smooth except for a network of low ridges calle..

Besides being useful, chemicals find use in artifacts as well. Ceramics, paints, varnishes, glass, cement are various other useful substances that contain various chemicals as their components. Construction industry is the major beneficiary of such substances. Of late, continuing research..

The control of the heart function is by a set of muscles and is, therefore, called myogenic . If the heart is removed from a living mammal and placed in a well oxygenated salt solution maintained at 37 o C, the heart continues to function though at a slower rate. Position of the Sino-atrial and Atr..

.003% of the total global water availability! Even though water is a renewable source, its evident conservation of water and non-pollution of freshwater sources is a must, given its vital importance both biologically and chemically and continuing global population explosion. Of the fresh water avai..

The plants upon which we depend for the food we eat, and for the oxygen we breathe, depend in turn upon the soil. A good soil supplies the plants with the mineral elements they use. Vigorous, highly productive plants can be grown in solutions of fertilizer minerals in the absence of soil. Mineral n..

The solar spectrum of electromagnetic waves include energy packed heat generating waves called radiation waves. As they lie beyond red colour waves of visible spectrum, they are also called 'infra-red rays'. These infrared rays lie in the wave length range of 700-900 mm. Two types of infrared rays ..

B. Why are noise levels so high in our cities? Noise pollution has various sources - vehicles, machines of varied sorts, our entertainment media -radio, T.V and music systems, loud speakers used at functions and festivals. The biggest culprit, however, is the vehicular traffic. Most of the buses, a..