Question

question 49
because of global travel, a new strain of antibiotic resistant bacteria arising in china may soon appear in new york city. the introduction of the new antibiotic resistant bacteria in new york would be an example of__.
a gene flow
b mutation
c environmental conditions
d natural selection

Explanation:

To solve this, we analyze each option:

• Option A (gene flow): Gene flow is the transfer of genetic material (like antibiotic - resistant genes in bacteria) between populations (here, from China to New York via global travel). This matches the scenario of the bacteria strain moving between regions.
• Option B (mutation): Mutation is a change in DNA within an individual organism, not the transfer of genetic material between populations. So this is incorrect.
• Option C (environmental conditions): Environmental conditions refer to factors like temperature, pH, etc., that affect organisms. The movement of the bacteria strain is not about environmental factors, so this is wrong.
• Option D (natural selection): Natural selection is about differential survival/reproduction based on traits. The scenario here is about the movement of the bacteria, not selection, so this is incorrect.

Answer:

A. gene flow