I'm going to apply for PhD programs of biology or biomedical science. I understand that I need certain semesters of biology, chemistry, biochemistry, and mathematics. Because I'm going to graduate in four years while double-majoring in math and biology, I can't afford to take courses of various subjects, as I can take, except for subjects belonging to math and science, only one semester of social study and humanities, two semesters of foreign language, and four semesters of PE. Since my college has quasi-open curriculum, there's no problem with the credit requirement of my school.
But should I take courses of various subjects for my PhD admission? Does variety of courses taken in undergrad matter in PhD admission?