Alabama Gov. Kay Ivey has signed into law a bill that bans transgender student-athletes from competing on single-sex teams that match their gender identity, making her state the second in the nation to enact such a ban. House Bill 391, which overwhelmingly passed the Republican-controlled state legislature last week, mandates that those who are not biologically male or female will not be able to participate in Alabama’s school-sponsored sports events that are exclusively for biological males and females, respectively. “A public K-12 school may not allow a biological female to participate on a male team if there is a female team in a sport,” the bill reads. “A public K-12 school may never allow a biological male to participate on a female team.” According to the bill, it’s important to make sure sports teams remain separate and sex-specific so that female athletes can have equal opportunity to compete, considering inherent …