Sorry the question is not about Biology because I have not been able to post a question or a comment. I write them out but there is some tech thing that is preventing acceptance. Please advise how I can contact you. user:35281
New users cannot post comments, but can post questions and answers (this caught me up too, since comments seemed so minor compared to a question or answer).
You should be able to post a question by clicking the "Ask Question" button in the upper right of the home Biology page.