biocanvas:  Early embryos from the fruit fly, Drososphila melanogaster, depicting mRNAs in blue and nuclei in red as visualized with fluorescence in situ hybridization (FISH) technology. Image by Eric Lécuyer and Henry Krause. Congratulations, riotglitterdust, for being the first to correctly answer this week's question! Make sure to check out their blog!
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