Fig. 2. (a) Sketch of the GI tract in a Drosophila larva (Image created with https://www.BioRender.com). (b) Picture of Drosophila larvae exposed for 24 hours to MNPs. The MNPs show a dark color and can be observed (1) in suspension in the PBS as dots scattered in the well, (2) inside the GI tract of the larva and (3) excreted as feces. (c) Picture of Drosophila larvae exposed to the 24 hours PBS control. The average length of Drosophila melanogaster 3rd instar larvae is approximately 4 mm.
