Question Detail
Question
Past climate changes such as ice ages often caused populations to survive in isolated pockets called:
Correct Answer
Option B is the correct answer.
Detailed Explanation
While 'refugia' isn't explicitly in the bulleted text, the concept of fragmented ranges surviving in isolated pockets during ice ages describes the formation of refugia. 'Biogeographic realms' are much larger, global divisions.
Hint
These are 'safe havens' where species survive harsh periods.