Welcome! You have arrived at this page either from the COS Online Schedule page, or a direct link from somewhere else. Bio 91 is an online, non-transferable, non-degree applicable, 1 unit pre-requisite course for the major level biology courses (Principles, Zoology, Botany), Physiology, and Microbiology at the College of the Siskiyous. This webpage serves as the portal into the Fall section that starts on Nov 3 AND the Spring section that starts on Dec 19. They are essentially the same class (the only reason that there are two sections is a college-related bookkeeping thing.) So it doesn't matter which section you're in, you can start the course anytime - as long as you finish it before Jan 9.


Read some statements from the first group of students to finish the class.

The course is self-paced and we expect students to be able to complete the course in a few weeks.

Read about textbooks for this course.

The following link has instructions to the formally enrolled student.

  Door to the Course