Many full-time students in Florida could be excused from serving on juries, under a proposal filed Tuesday in the Florida House. The bill would allow people to be excused from jury duty if they are 21 or younger and are enrolled as full-time students in high schools, state colleges, or state universities. Law-enforcement officers are already excused unless they choose to serve and judges may excuse expectant mothers, attorneys and physicians. Also, the governor and members of the state Cabinet are disqualified from jury service.