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Consciousness and Behavior

Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

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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..

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Evolution of Life – Ancient Earth

Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..

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The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..