I think gravity and light work the same on psych majors as it does physics and engineering students…
I kid.
So in biology I know e the Euler number is important. It is used in growth equations (from finance to physics as well).
Statistics is fucking huge in every field. That is how you measure uncertainty. Bell curves and the Five Numbers and all that stuff is how you analysis thousands of widgets coming off an assembly line, or measurements in the social sciences field.