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Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

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Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..

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Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

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Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

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Biological Cell Defense

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