user1368: My question is about this post. I would appreciate it if a few folks with strong biology backgrounds could weigh in. 
There are currently three close votes on what appears to me to be a classic SAT-type biology question about osmosis. The reason is "off-topic" because it's not on the list of topics in the Help Center.
Okay I am mystified. An upvoted comment suggests the question would be a "better fit" for physics or chemistry, but I think this is one area in which chemistry, physics, and biology intersect, as a basic understanding of osmosis underlies an understanding of cell membranes. 
As far as I know most of the lab experiments in osmosis shown online are associated with first-year biology classes. The topic is covered in physics and chemistry but the underlying thermodynamics is too technical for a first year course and there are other lab priorities.
Have I missed some sea-change in academic thinking about this topic? 
Edit: The question is now closed as off topic. I nominated the question to be re-opened and am requesting that it be re-opened by moderator in any event. This closure seems particularly strange given the dearth of clearly articulated college-level biology questions on the site. 

user6: Osmosis is on-topic, it is a fundamental concept that plays a significant role in biology. 
One could maybe justify closing this specific question due to our homework policy, but not because of the actual topic of the question.

user948: I voted to close, as I believe the question belongs on Chemistry.SE. While osmosis is a fundamental biological concept, the question doesn't have anything to do with biological processes per se, it is simply a chemistry question.

1368: <p>My question is about <a href="https://biology.stackexchange.com/questions/17790/diffusion-of-hypotonic-solution-into-solution-with-glucose-and-starch">this post</a>. I would appreciate it if a few folks with strong biology backgrounds could weigh in. </p>

<p>There are currently three close votes on what appears to me to be a classic SAT-type biology question about osmosis. The reason is "off-topic" because it's not on the list of topics in the Help Center.</p>

<p>Okay I am mystified. An upvoted comment suggests the question would be a "better fit" for physics or chemistry, but I think this is one area in which chemistry, physics, and biology intersect, as a basic understanding of osmosis underlies an understanding of cell membranes. </p>

<p>As far as I know most of the lab experiments in osmosis shown online are associated with first-year biology classes. The topic is covered in physics and chemistry but the underlying thermodynamics is too technical for a first year course and there are other lab priorities.</p>

<p>Have I missed some sea-change in academic thinking about this topic? </p>

<p>Edit: The question is now closed as off topic. I nominated the question to be re-opened and am requesting that it be re-opened by moderator in any event. This closure seems particularly strange given the dearth of clearly articulated college-level biology questions on the site. </p>
 6: <p>Osmosis is on-topic, it is a fundamental concept that plays a significant role in biology. </p>

<p>One could maybe justify closing this specific question due to our homework policy, but not because of the actual topic of the question.</p>
 948: <p>I voted to close, as I believe the question belongs on Chemistry.SE. While osmosis is a fundamental biological concept, the question doesn't have anything to do with biological processes <em>per se</em>, it is simply a chemistry question.</p>
