Why fruit flies eat practically anything

https://www.sciencedaily.com/releases/2019/09/190903113339.htm

Researchers uncover why some organisms can eat anything — ‘generalists — and others have strict diets — ‘specialists’. Using different Drosophila species the team found that diversity in diet stems from the flexible response to carbohydrates regulated by the TGF-?/Activin signaling pathway. Specialists accumulated metabolites under high carbohydrate conditions, culminating in reduced adaptation, while generalists do not.

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