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Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..

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Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

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A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

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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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Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...

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Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..