For me... General bio was the most difficult bio course by far! I remember on our first exam only 1 student got an A out of 476 students in our class
I found it more difficult because general bio covers so much more compared to a specific bio course such as zoology or botany. It's also so fast paced because it covers a lot. I still managed a B, but I definitely found it harder than the bio courses after in my opinion
Don't mean to scare you, it's very doable though and you may have a different experience than me
Chem is harder than bio for sure. Organic chem was the death of me
