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large spongy organs in which gaseous exchange takes place in vertebrates (with the exception of the fish).
the discharge of heated water directly into rivers, lakes or the sea, usually from power plants...
small groups of cells found in the pancreas that secrete the hormones insulin and glucagon.
a state in which the body has become dependent on a chemical substance in order to function.
a graphical representation of the evolutionary relationship between taxonomic groups based on...
an informal term for any living species which appears to be the same as a species otherwise only...