Drosophila in leaves of Centella asiatica (IMAGE)
Caption
The level of motivation of the fruit fly Drosophila can be deduced on the basis of whether it attempts to climb over gaps it encounters when walking. In a depression-like state, the fruit fly is less likely to do so. In the background are leaves of Centella asiatica, the Indian pennywort.
Credit
photo/©: Helen Hovoet, Hans-Hermann Huber
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CC BY-NC-ND