I passed biology with a near 100%, I had at least 90% in physics, and i think i failed chemistry. In all honesty i think it comes down to which one someone prefers more and how good the teacher is at teaching that subject (And having a teacher that speaks fluent english without thick accent helps). In biology i had an amazing teacher which in turn made it easier to learn. In both school where i was taught chemistry they were both foreign ( one was spanish, the other was indian) and i had a hard time learning, plus the spanish one wasn't exactly great at time management
Physics was just easy for me because i was good at math and the teacher was alright if you weren't an starfish, but he was one of the teachers that graded notes, thus not having 100%
then you'd think biology would be a freshman class.
It IS a freshmen class. Chemistry is more of a sophomore class while physics is usually junior/senior year. Biology has barely any prerequisite classes, whilst chemistry and physics both need a math class beforehand in order for it to be easily understandable.