A Heat-Killed, Phosphorescent (Light-Emitting) Strain of Bacteria Is Mixed with a Living

question 20

Multiple Choice

A heat-killed, phosphorescent (light-emitting) strain of bacteria is mixed with a living, non-phosphorescent strain. Further observations of the mixture show that some of the living cells are now phosphorescent. Which of the following observations would provide the best evidence that the ability to phosphoresce is a heritable trait?

• A) Evidence that DNA was passed from the heat-killed strain to the living strain.
• B) Evidence that protein passed from the heat-killed strain to the living strain.
• C) Especially bright phosphorescence in the living strain.
• D) Phosphorescence in descendants of the living cells.

---

Definitions:

Grand Army

A large and powerful military force, especially one of historical significance such as Napoleon's Grande Armée during the Napoleonic Wars.

Foreign Conscripts

Individuals drafted into military service from another country, often without their consent, to serve in the armed forces of an adopting nation.

Louisiana Territory

A vast area of land in North America that was acquired by the United States from France in 1803, doubling the size of the young republic.

Colonialism

The policy or practice of acquiring full or partial political control over another country, occupying it with settlers, and exploiting it economically.