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The terms ecosystem was introduction by Sir Arthur tensely in 1935. An ecosystem can be defined s "a structural and function unit of biosphere consisting of living organisms and their physical environment, both interacting and exchanging the materials between them". In other words," an ecosystem is an area that contains organisms For example Plants, animals, bacteria and human beings etc. which are interaction with one another and with their non- living environment". An ecosystem may be big or small, natural or manmade, eg.:
(i) Micro organism such as bacterial limited to few mm2 or cm2 areas (Natural).
(ii) Desert ecosystem may exist in hundreds of Km2 area (Natural).
(iii) Crop field , aquarium (Man made).
Q. What are persistent organic pollutants (POPs)? The POPs, or persistent organic pollutants, are toxic substances formed from organic compounds. The POPs are made in several i
When the action potential reaches the nerve terminal it causes the let go of a chemical neurotransmitter by the synaptic vesicles. Mammalian nervous system employs many substances
Describe Class Agnatha in details? Class Agnatha takes its name from the Greek word "gnathos," which means jaw, and "a," which is the prefix for "without." These jawless fishes
Explain the Donnan Membrane Equilibrium? If one of the solutions in a two-phase membrane equilibrium contains certain charged solute species that are unable to pass through the
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What is Neurological Complications of Congenital Heart Disease ? Neurological complications contribute substantially to mortality and morbidity from congenital heart disease.
Importance of water in the body Water is the most essential constituent of life. Life cannot exist without water. About 90% of water is present in protoplasm Water
What are the androecium and the gynoecium? What are the other structures of flowers? Androecium is the set of male reproductive structures of flowers. It comprehends the stamen
Explain about the primary protein derivatives? a) Proteins: These are the insoluble products which result from the incipient action of very dilute acids or enzymes. e.g. casein
Define Water as a source of dietary minerals? Although water is composed of only oxygen and hydrogen, the water we drink or use in food preparation can contain significant amou
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