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When toxic substances enter lakes, streams, rivers, oceans and other water bodies, they get dissolved or lie suspended in water. This causes pollution of water bodies, which degrade the quality of water so that either becomes health hazard or unfit for use and known as water pollution.
It is defined as deterioration of physical, chemical and biological properties of water brought about mainly by human activities and natural activities which causes harmful effects on human, plants and aquatic life.
Example: Domestics sewage, waste water discharge, industrial effluents, surface runoff water into river and sea.
a) What does secondary productivity in an ecosystem indicate? b) List any two factors by which productivity is limited in aquatic ecosystems
An account of characters of mollusca
As we have seen, in during epinephrine hormonal control or glucagon, dephosphorylated phosphorylase kinase is activated by being phosphorylated by protein kinase. This then a
Explain how the uterus supports the development of a baby during gestation
Q. What are the major events of the first mitotic period? The first mitotic period is the prophase. During prophase the following events occur migration of each centriole pair
What are the types of good in the demand curve? Some types of good are as follows: • Normal good: When incomes of consumers/households increase the quantity demanded wo
What characteristics distinguish fungi from plants? Fungi contain some unicellular forms, but plants do not; most plants are autotrophic, but all fungi are heterotrophic. Fungi
What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?
Careful palpation of the upper and lower limb pulses would make one suspect coarctation as the cause of hypertension. The lower limb pulses are weak and delayed. Confirmation ca
Why is the determination of the blood types of the donor and of the recipient important in transfusions? Red blood cells have dissimilar antigens in the outer surface of their
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