Top: “Single optical section through the whole gut of a Drosophila melanogaster larva expressing a reporter for Notch signaling pathway activity (green), and stained with cytoskeletal (red) and nuclear (blue) markers.”

Bottom: A mature male Drosophila Melanogaster fly. These organisms are common in biological research - you may know them just as the common “fruit fly.”

Image Credit:

Larval Gut - Jessica Von Stetina, via the Nikon Small World Competition

Mature Male Fly - André Karwath