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In an experiment, the right forepaw of a developing mouse embryo is examined. The tissue and cellular structure are microscopically analyzed with histology at several developmental time points. The student finds that in the earliest time point, a population of cells located between the future digits of the paw undergoes growth-arrest and then subsequent cell death.

If a similar experiment examining limb development were conducted in a normally developing zebrafish, what observation regarding the cellular population undergoing cell death would be MOST likely?


The population would expand to include the entire right limb.


The population would condense and break off to form an additional embryo.


The population would proliferate indefinitely.


The population would no longer be observed.

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