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all the different living organisms on the Earth from the smallest micro-organisms to the largest multi-cellular organisms.
the site where a nerve impulse is transmitted from one neuron to the next. There is no physical...
the inner region of the kidney, striped in appearance, made up of renal pyramids.
a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy,...
a physical and psychological dependence on alcohol, which affects every aspect of a person's...