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Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..

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Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

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Chemical Composition of the Body

The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

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Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..

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Passive and Active Types of Immunity

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

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..