My question (How can physicists help in theoretical biology, besides math and fresh perspectives?) is decided to be off topic because of this reason:
However, please do not ask questions about:
- The content of your research, rather than the process of doing research
As I stated in this comment, at first I have doubted that the question I ask will be off topic, but after seeing the changing-fields tag, I think this question is on topic.
Searching for this reason, I only find out the proposal of changing the help center.
In the Is "What background do I need to do research in specific field X?" on-topic at Academia.SE? question, ff524 agrees that this kind of question is on topic.