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Answer 1

12. Fermentation - the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat.

"the fermentation of organic matter by micro-organisms in the gut"


14.Pollen tube - a hollow tube which develops from a pollen grain when deposited on the stigma of a flower. It penetrates the style and conveys the male gametes to the ovule.