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Lithosphere (Xerarch) - It is a type of xerosere and involves the ecological succession on bare rock surfaces. Rocky surface is characterized by i) deficiency of water ii) absence of organic matter iii) surface temperatures are very hi..

Introduction - Biogeography reveals that living organisms (plants and animals) are found practically everywhere on this earth. The living components interact among themselves as well as with their physical environment like soil, air and water. The branch of biology, which deals with the relationshi..

Electricity is obtained from flowing water. The flow of water is checked by building a dam. The water from the dam is allowed to flow through the tunnels at a high pressure. Turbines convert the potential energy of the water into electricity. About 23,800 MW of energy is generated by hydel power in..

Underground soil in cities is likely to be polluted by Chemicals released by industrial wastes and industrial wastes Decomposed and partially decomposed materials of sanitary wastes Many dangerous chemicals like cadmium, chromium, lead, arsenic, selenium products are likely to be deposited in under..

Many industries such as goldmines, cement industry, iron ore mines, coal mines, bauxite mines have excavated the land to very deep layers to extract the ore. But most of them have never devised any method to cover up the excavations. Many such excavations have spread to several square kilometers a..

Ecology concerns with the associations and interactions of the organisms and the environment in general. The living place or dwelling place of an organism is called habitat. Within a given habitat there exists variations or micro habitats. In a given habitat we can observe physical ..

Electricity is obtained from flowing water. Water from the dam is allowed to flow through the tunnels at a high pressure. Turbines convert the potential energy of the water into electrical energy. About 23,800 MW of energy is generated by hydel power in India. Hydel power requires construction of b..

In parapatric speciation, the zones of two diverging populations are separate but do overlap. There is only partial separation afforded by geography, so individuals of each species may come in contact or cross the barrier from time to time, but reduced fitness of the heterozygote leads to selectio..

Naturally occurring animals, plants and their species, which are not cultivated, domesticated and tamed, are called wild life. The Indian fauna includes variety of animal life such as mammals, birds, reptiles, fishes, insects etc i.e. about 800 species of mammals, 2000 species of birds, 420 species..

Question: Read the following phrases. Rearrange them to form meaningful sentences: 1. the only planet /earth is perhaps/universe/which is inhabited/ the /in this vast/by life forms/living in a supporting environment. 2. Encasing earth/a thin cover/sustains life/of air and water/ known as th..