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phosphorus cycle is sedimentary cycle because it does not enter into atmosphere. it can be found on earth in water soil and sediments. the phosphorus
sulphur is one of important of proteins vitamins and hormones. it plays a very crucial role in health of both plants and animals. most of earth
carbon is important constituents of all organic compounds. it forms 49 of dry weight of the organisms. earth atmosphere contains 0.03 carbon
water is an essential commodity for survival of life on these plants. the circulation of water and moisture between living organism atmosphere and
the cyclic exchange of nutrient material between organisms and non-living environment is called biogeochemical cycle geo means earth chemical
an ecosystem is a self sufficient interacting system in the biosphere. eg. forest desert pond etc. almost all the ecosystem have more or less similar
ecosystems main functions are physical chemical and biological processes. which is required for if maintenance of ecosystem. some important
an ecosystem consists of two types of componentsa abiotic componentsthis includes the non-living components of the ecosystem. these are
ecosystems are so varied in form and structure that whatever has a distinct community of its own can be called an ecosystem eg. a crop field grass
the terms ecosystem was introduction by sir arthur tensely in 1935. an ecosystem can be defined s a structural and function unit of biosphere
in biology a species is smallest and basic unit of classification. each species is placed within a single genus. for example biological name of human
ecology is divided into two fields aautecology b synecology a autecology it deals with life history population dynamics
the main objectives of study of ecology arei to study the distribution of biota local and geographical level.ii
ecology is a interdisciplinary branch of science that deals with inter relationship between living organism and their environment.the term ecology
the environmental pollution has become a biggest threat to humanity. to over-come this problem a suitable preventive legislation is need of
i area uses or permit exposure to radiation should be marked restricted area or radiation zone etc.ii
following ways can be used for control of noise pollutionit can be controlled by designing fabricating and using quiter machines.in heavy industries
following steps must be takendomestic and industrial garbage should be profitably utilized. compost pits and installation of gobar-gas plant in rural
various waystechniques suggested for control of water pollution are as follows1. pollutants radio active chemical biological present in water bodies
air pollution can be controlled by two fundamental ways.preventive techniqueimportant measure to control air pollutionsuitable fuel having low
i effect of human healtha mercury compounds in waste water in converted into methyl mercury bybacterial action which causes numbness of limbs lips
i effect on human healthair pollution causes many respiratory problems in human being.1 dust soot and smog causes several
there are two main sources of pollution1. natural sources a volcanic
radioactive pollution is a very special form of pollution of air water and soil with radioactive material. its nature of contamination and effects
sound is a main mean of communication and entertainment and is also very effective alarm system for some animal. a loud and unwanted or unpleasant