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a clear, colourless, odourless and tasteless liquid that can also occur as a gas (water vapour) and solid (ice). Water is known as the universal solvent and is essential to life on Earth.
water that falls to earth in any form, such as rain, snow, hail and sleet.
a cluster of capillaries situated inside Bowman's capsule in the nephron.
a tough substance made from a modified polysaccharide that contains nitrogen. It is the main...
an individual who donates an organ for the purpose of transplanting it into another person in an...