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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..

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The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

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The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..