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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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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

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Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

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