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This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

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This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

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Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

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The Evolutionary Development of Multicellular Organisms

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

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Neurology of Illusions

Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

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The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..