General Biology II and MCAT question???

[YeaWutever]

Im taking General Biology II right now over the summer for financial aid purposes to maintain a certain amount of hours (another story). Being new to the college life I have realized that science courses over the summer are not a wise choice. I just bombed a test dealing with the animals and their classification. I personally do not have the time to backtrack and relearn all those chapters because we have moved on to new material. I am sure that there will be other topics in other classes that may be essential to the MCAT but are overly rushed. I personally can careless about learning about annelids, arthropods, etc. because I am a pre-med but its essential for the MCAT not medical school so....I got to "know" it. How do you prepare for the MCAT if material taken in a class was rushed?