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This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..

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Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..

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Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

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

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Developmental Biology

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Origins of Life on Earth

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