I saw an increase in the number of closed questions on the main page. From 46 questions I counted, 14 were closed. I understand biology overlaps with many fields so I checked "Computer Science" (14 questions on front page, 0 closed) and Mathematics (96 questions, 4 closed).
Many questions in Biology are marked as off-topic but are actually on topic. Here is a list composed of the off-topic I consider on topic (not all off-topic)
Why can't SCUBA tanks use pure oxygen, but deliver it to you through the regulator at a fifth the normal rate? - is a "general questions about biological concepts"
Do airsacs contract and expand when birds breathe? - is a question about a biological mechanisms
Difference between embryo and stem cells? - is a "general questions about biological concepts"
sequence specific endoribonuclease - full disclosure, I asked it. is a "question about techniques in a biological or biochemical laboratory". It is marked as homework question. I got good possible answers in the comments.
Why doesn't oxygen give us 'the bends' like nitrogen does? - - is a "general questions about biological concepts"
This question was marked as need clarity (not off-topic) but is very clear to me Reviving an animal heart using electrodes
This posts do not have a comment recommending the author to change their question or explaining what is going on. This is NOT USER FRIENDLY, this does not allow the community to grow and is not positive criticism.
Many of these questions are general biology questions, not very sophisticated, but it is written that "Biology Stack Exchange is for people studying biology at any level".
I don't know how the process of closing a post works, I would like to know if this is the accepted policy of the Biology site, to close many questions and without explanation.