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the very cold zone in an ocean, dam or a lake, located below the range of effective light penetration (the limnetic zone).
compounds such as lipids, carbohydrates, proteins, nucleic acids, vitamins, petrochemicals and...
kidney failure which develops over a long period of time.
specialised heart muscle tissue between the right atrium and right ventricle which conducts the...
this muscle 'closes' or bends the joint when it contracts (so the angle between the bones...