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Context-informed PBL using whole organisms. Students tracked the effects of chemicals, such as ammonium nitrate, in the development of zebrafish embryos. Representative images over a 141 hours show that ammonium nitrate affects fin development. A) Example of zebrafish embryos at the beginning of the experiment. B) Example of zebrafish embryos after 141 hours shows a delay in fin development in low and high concentrations of ammonium nitrate.
