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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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This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

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Lotic Communities & Animals

A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

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Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

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The Evolutionary Development of Multicellular Organisms

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