Temperature and food preference

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Science  26 Oct 2018:
Vol. 362, Issue 6413, pp. 416-417
DOI: 10.1126/science.362.6413.416-f

On a cold day, hot soup seems nice. This desire has a fundamental evolutionary basis that may lie in survival. Brankatschk et al. provided Drosophila fly larvae with a choice of food types: one containing only yeast and another consisting only of plant material. At moderate temperatures, yeast was preferred, but at cold temperatures, the larvae's preference shifted to plant material. When these larvae metamorphosed into adult flies, they showed increased cold resistance and improved survival in the winter, possibly because the plant fatty acids enhance membrane fluidity and motor coordination.

Dev. Cell. 46, 781 (2018).

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