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Ice fish and Antartic fish remain active in extremely cold water due toA. development of thick layer of sub-cutaneous fatB. development of extra solute in body fluidsC. development of ice nucleatinf protein in extra cellular spacesD. both (b) and (c) |
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Answer» Correct Answer - D Ice fish or Antarctic fish remains active even in extermely cold sea water due to cold hardiness. Cold hardiness is achieved by developing extra solutes in the body fluids and special ice nucleating proteins in the extracellular spaces. The extra solutes which prevent freezing are glycerol and antifreeze proteins. They lower the freezing point of body fluids. |
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