Tied 31-31 at the break, Northern Colorado (3-6, 1-0 Big Sky) shot 73.7 percent from the floor in the second half, hitting 14 of 19 shots, but North Dakota didn't make it easy, going on a 22-10 run to begin the second half.
The Bears began their comeback with a 3-pointer by Paul Garnica with 10:02 to play, sparking a 34-13 rally from that point on.
Tate Unruh had 13 points and 10 rebounds for the Bears and Garnica ended his night with 14. Barden had nine rebounds to go along with his point total.
Former Kentucky guard Ed Davender, the only Wildcat with at least 1,500 points and 400 assists, has died. He was 49.
Guard Naz Mitrou-Long, whose 2015-16 season ended in December due to hip problems, has been granted a hardship waiver for the coming season, Iowa State said.
As the Sooners look to life without superstar Buddy Hield and his sidekicks, it's clear their unseasoned players will need to grow up fast.