Lots of teams have done this.
Toward the end of the 2002 season. We entered 2003 Season ranked number 2 behind Florida State :) Roll Tide!
they were ranked number one all season until they lost to the North Carolina Tarheels in the NCAA men's championship
About 36 games are played In a college basketball season.
2001 FSU team.
UCLA Then Duke at 2
kansas, Kentucky, Texas, Syracuse
As of the end of the 2012 season, the Kentucky Wildcats have won 2090 games. They are ranked #1 in all time wins in NCAA Men's College Basketball.
It varies from team to team, year to year. There is no set number.
Yes, basketball is played in college. This is called college basketball. There are multiple conferences in which the teams play in (i.e. ACC, Pac-10, Big 12, etc.). At the end of the season, the top ranked teams go head-to-head in a giant playoff system called "March Madness."