Yes, but...with VU being a private institution, does the protected class system apply to VU? For example, I suspect Baylor University has no problem allowing Christian groups on campus to require members/leaders to profess a belief in Jesus Christ...and I don't believe BU is violiating any law in allowing that type of requirement.
VU is no more compelled to protect biology majors than it is compelled to protect Christians, ie its not compelled to protect either one. VU is selective in what groups it chooses to protect, not because of force of law but b/c of which groups it deems worthy of protection and which groups it believes are not worthy of protection. Very arbitrary in my view.