I am not sure how exams will be run in the upcoming semester, but based on my past experience, there are four exams (non-cumulative). The exams are (usually) a mix of multiple-choice and free-response. 
Study methods are subjective for the most part, so what I did to receive an A in the class may not necessarily work for you. I’m going to list how I studied/navigated Bio 172:

• Printed out lecture slides or used an iPad and took notes directly on the slides during lecture.
• If I wasn’t fully focused or paying attention during lecture, I rewatched the lecture later on in the day.
• I read the textbook after the lecture took place and supplemented my notes with textbook material.
• If anything was still unclear, I would ask questions before/after class or over email.
• To prepare for exams, I would redo discussion assignments, review the lecture objectives, and do practice exams provided. 

I think that one of the most useful habits I engaged in was reviewing and supplementing lecture notes after lecture so that I wasn’t stuck learning/remembering concepts before an exam.
Additionally, if you find that you struggle with biology a lot, it is possible to get an override into a CSP section as a non-CSP student. CSP classes are smaller in size (allowing for more engagement with the professor) and discussions are held twice a week (rather than once). I would say CSP is helpful, but it all ultimately boils down to your study habits. 
I hope this helps! 🙂