After mixing a heat-killed, phosphorescent (light-emitting) strain of bacteria with a living, nonphosphorescent strain, you discover that some of the living cells are now phosphorescent. Which observation(s) would provide the best evidence that the ability to phosphoresce is a heritable trait?
a. phosphorescence in descendants of the living cells
b. evidence that DNA was passed from the heat-killed strain to the living strain
c. especially bright phosphorescence in the living strain
d. evidence that protein passed from the heat-killed strain to the living strain
Answer: a. phosphorescence in descendants of the living cells
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