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Autacoids or "autocoids" are biological factors (molecules) which act like local hormones
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D) The smoke would settle around cities, reducing visibility.
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When a glucose molecule is assembled during photosynthesis, the process takes up 12 hydrogen ions from the stroma of the chloroplast.
Nucleophile, in chemistry, an atom or molecule that in chemical reaction seeks a positive centre, such as the nucleus of an atom, because the nucleophile contains an electron pair available for bonding.
