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Bryophytes are a plant group characterized by being nonvascular. They include the mosses, the liverworts, and the hornwo..

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This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

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Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

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This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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