You have several hives of honey bees, Apis mellifera , that you keep in your backyard. Some bees uncap and remove dead larvae from cells, while others leave dead larvae in the cells; this difference is genetically determined. After a particularly hot summer in which many bees die from disease, you notice that the only hives remaining are the ones in which bees uncap and remove dead larvae. You have witnessed:
a) a population-level change in allele frequency.
b) a population-level change in the frequency of a behavioral trait.
c) evolution has not occurred, only bad weather.
d) Only a) and c) are correct.
e) a), b), and c) are all correct.
Ans: d) Only a) and c) are correct.
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