Where are proteins dismantled and absorbed?

Protein are digested by proteases in the stomach and small intestine into amino acids which are then absorbed in the small intestine and protein are first broken down in the stomach into preptones and proteosens by the action of pepsin on them

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affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.