Cheetahs in current populations are more resistant to new diseases. The survival rate of young cheetahs is increased in current populations. Cheetahs in current populations are less able to interbreed with other species. The current cheetah populations are less likely to be able to adapt to environmental changes.
I gave my students this multiple choice question: Cheetahs have come close to extinction due to hunting, drought, and disease. There is now very little genetic variation in cheetah populations. Which of the following is a result of the limited genetic variation in the current cheetah populations compared to earlier cheetah populations with more variation?

Only one answer is correct among these 4 choices:
- Cheetahs in current populations are more resistant to new diseases.
- The survival rate of young cheetahs is increased in current populations.
- Cheetahs in current populations are less able to interbreed with other species.
- The current cheetah populations are less likely to be able to adapt to environmental changes.

Could you tell me which one is correct?

The current cheetah populations are less likely to be able to adapt to environmental changes.