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biological, chemical, or physical agent that stimulates a characteristic function or causes a particular response, especially an inflammatory response.
the series of activities that takes place in a cell leading to its division and duplication (...
unable to notice or respond to things that you would usually be aware of through your senses....
a method of ordering the age of different fossils, relative to each other, without working out...
the blood vessel that carries blood from the liver to the inferior vena cava.
the very cold zone in an ocean, dam or a lake, located below the range of effective light...