AP Bio

So my teacher recently began assigning a chapter a day, literally, for the AP bio campbell reece textbook, and each chapter is 15-25 pages long. I have lots of other homework and other activities, so how can I spend little time on the textbook (15-45 minutes) and still retain all the information efficiently?

If your goal was to have spent <45 minutes on HW or this class, then you should have selected another class. A 15 min HW expectation is unrealistic.