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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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The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

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Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

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ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

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It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..