The biological processes learned in biology are driven by chemical reactions. Therefore, a good understanding of introductory chemistry is required to learn biology. While DIVE Integrated Chemistry & Physics (ICP) teaches all the introductory chemistry required to excel in biology, Apologia Physical Science is lacking many of these important concepts.
Therefore, while it is not required, Dr. Shormann recommends taking DIVE ICP before Biology. An Accelerated Schedule is available that allows the student to complete the course in 12-16 weeks.