In a manner originating from or caused by external sources or factors outside a system.
From 'exogenous' (Greek 'exo-' outside + 'genous' producing) + '-ly' forming an adverb, describing how something occurs from an outside origin.
When researchers say a plant's growth was affected 'exogenously,' they mean something from outside—like drought or pests—changed it, which helps them prove what factors actually matter!
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