Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: Blue cheese is blue because of the fungus growing throughout it. Answer: blue
[EX A]: What color is the fungus in blue cheese?

[EX Q]: Passage: The pulmonary circulation carries blood between the heart and lungs. The systemic circulation carries blood between the heart and body. Answer: heart and lungs
[EX A]: The pulmonary circulation carries blood between what two organs?

[EX Q]: Passage: Marsupials. Marsupials include the kangaroo, koala, and opossum. Answer: marsupials
[EX A]:
Kangaroos, koala and opossums are part of what group?