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(also called an extinction event) the sudden dying out of large number of species over a short period of geological time.
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
an abnormal response of the immune system to the protein in certain foods.
the series of activities that takes place in a cell leading to its division and duplication (...
part of cellular respiration: a cyclical series of reactions in which the pyruvic acid formed in...
a state in which the body temperature has dropped to dangerously low levels.