I really dislike Biology

My Biology teacher is giving me a hard time. I got a horrible grade on my Photosynthesis quiz, and when we do quizzes on Quia.com, she expects us to keep redoing it until we get a 100%, and if you don't, she gives you a zero. And on tests, if we get lower than 70%, you have to do test corrections. Luckily, I didn't have to do them. I was in the 80% range of test, and 80% range on quizzes. I am truly upset, because I don't care about this stuff. They don't interest me. Photosynthesis, Cellular Respiration, ATP, ADP+P, NADPH, NADP+, Ecology, Producers, Consumers, Autotrophs, Heterotrophs, etc. I really don't care. I don't even bother to listen, and I have a C in that class. IT used to be a B and then it went down to a C just because I didn't redo the stupid quiz and get a 100% and she gives me a zero. Most of my classmates and friends don't really mind; I do! I try so hard, but I end up failing. Why can't I get at least an A, and I try so hard?! I tried my best on that dumb Photosynthesis test, and I get a D?! Seriously?! Ugh. Life sucks in Biology. I never liked Science, and Science is important for becoming a physician, when I absolutely hate that class! It pisses me off, when I try so HARD, and end up getting a bad grade for a tiny mistake. *sigh* I wait till the weekend starts. I'm stressing over my 2 C's, one B, and 4 A's. I used to have 5 A's, and 2 B's. But, because of one little mistake, I get a C. UGH! I just want to cry, which I'm already doing, because I try so DAMN hard! Why can't you change my grade, damnit?! MY teacher always says "Well, you got to try harder." I'm doing all that I can, because I got other homework to do in other class. 7 classes total! I need a break......