No. It depends on the local standards, but generally we have a choice of different sciences we can pursue. When I was in highschool I took Earth Science, Chemistry I, Chemistry II, Biology, Bio-lab I, Bio-lab II. I could have swapped out Earth Science for Physics and one of the labs for a Physics lab if I had wanted, but at the time my maths were poor enough that I decided to stay in the less "mathy" sciences and more lab work.