instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: tobacco smoke causes fatal lung disease in nonsmokers. Answer: tobacco smoke
answer:
What still causes fatal lung disease in nonsmokers?

question:
Passage: Bacteria change nitrogen gas from the atmosphere to nitrogen compounds that plants can absorb. Answer: bacteria
answer:
What changes nitrogen gas from the atmosphere to nitrogen compounds that plants can absorb?

question:
Passage: Layers of Human Skin. The outer layer of the skin is the epidermis, and the inner layer is the dermis. Most skin structures originate in the dermis. Answer: dermis
answer:
Where do most skin structures originate in?