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

[EX Q]: Passage: In eukaryotic cells, the DNA is kept in the nucleus. The nucleus is surrounded by a double membrane called the nuclear envelope. Within the nucleus is the nucleolus. Answer: nucleus
[EX A]: In eukaryotic cells, where is the dna kept?

[EX Q]: Passage: Scientists may publish articles about their research in peer-reviewed science journals. Peer review means that the work is analyzed by peers, in other words, by other scientists. The articles are published only if the other scientists are convinced that the research is accurate and honest. Answer: peer review
[EX A]: What is the process where scientific articles are checked and analyzed by other scientists before publication?

[EX Q]: Passage: Oceanography is the study of the oceans. The word oceanology might be more accurate, since "ology" is "the study of. " "Graph" is "to write" and refers to map making. But mapping the oceans is how oceanography started. Answer: study of
[EX A]:
What does the ending 'ology' refer to?