You want to conduct a series of experiments involving the Ha…

You want to conduct a series of experiments involving the Hawaiian bobtail squid, so you acquired a number of eggs to incubate them under controlled laboratory conditions. However, two days after the juveniles hatched from the eggs, you find that none of them is producing bioluminescence. Why?

During an Escherichia coli-related outbreak of food poisonin…

During an Escherichia coli-related outbreak of food poisoning on campus, 16S rRNA sequences were obtained from the stools of several infected students. Phylogenetic comparison of the sequences to those on file at the local health department and at the CDC can be used to do the following:

Two tubes are inoculated from the same tube containing a bac…

Two tubes are inoculated from the same tube containing a bacterial culture. The cultures are then transferred every day for 2 months. All of the media and growth conditions are the same in every tube. After 2 months of cultivation, the fitness and genotype frequencies of the populations in the two tubes are compared. The fitness of the two cultures is the same, but the genotype frequencies are very different in the two cultures. How is this possible?