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the excessive growth of algae in eutrophic streams, rivers and dams.
a chemical messenger produced and released by a cell or a gland in one part of the body of the...
a state in which the body temperature has dropped to dangerously low levels.
a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. A...
(also called autotrophic organisms) organisms that produce their own organic food, mainly...