Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
pupil noun [C] (EYE PART). âº the âcircular âblack âarea in the âcentre of an âeye, through which âlight âenters: Pupils âcontract in âbright âlight, and âdilate in darkness. (Definition of pupil from the Cambridge Advanced Learners Dictionary & Thesaurus Â© Cambridge University Press).
There are actually quite a few causes, some of which are controllable, others that are not. The pupil is an opening that permits light to penetrate your eyes. When you have big pupils this means that your eyes are dilated, allowing more light to enter.You can actually test this theory by standing in front of a mirror in a dark room.here are actually quite a few causes, some of which are controllable, others that are not. The pupil is an opening that permits light to penetrate your eyes. When you have big pupils this means that your eyes are dilated, allowing more light to enter.