Close second was comparative vertabrate anatomy.
bio 101/102 at Fordham...was entitled "Chordate Morphogenesis". managed a B on a wild curve...
Are you too young to remember keypunch cards? That's the way I took all my CS classes in college!
Hollerith Punch Cards?? I remember them, they always seemed to be getting phased out when I came along. not tpp much fun when the tray fell.
I have far too much education, but I still shudder when I remember geometry.
I didn't care for geometry in high school either. But I think physics was hardest.