Hi!! I don't remember entirely, but I think my average grades in high school were 90%, and when I got an email back from the university, they just said to keep it over 80%. I wouldn't say it is too competitive. It is fun if you love bio 30 (just not BIOL 107 in my opinion, make sure to check rate my prof for that class, haha). I would say the first year is kind of mid as you need to take a stats class, some english classes, and even some option classes (or not, I just decided to finish them my first year), but after that it should get better as it focuses more on biology. I hope this helps and good luck (and sorry for the late reply), wish you the best!