It was deadline day Friday in the Minnesota Legislature, when most bills need at least one committee approval to stand much of a chance of being approved this session. Legislators have been especially busy this week trying to give as many proposals a hearing as possible. Among the bills that received committee approval Thursday was a controversial measure that would require universal background checks for gun buyers. In other action, a Senate education panel approved a measure that would enable undocumented students who meet certain criteria to pay in-state tuition rates at all Minnesota colleges and universities. Nearly 1,600 bills have been introduced in the Minnesota House this session, and more than 1,400 in the Senate. Budget bills face later deadlines. Bills that miss the deadline on occasion resurface later as amendments to other bills.