According to the rules in the NFL yes they can.
Yes. Any scrimmage kick (punt, field goal) you can advance from the end zone as long as the ball hasn't touched the ground in the EZ before being caught by the returner.
Al Nelson, a cornerback for the Philadelphia Eagles between 1965-1973, was the first player to return a missed field goal 100+ yards when he returned one 100 yards against the Cleveland Browns on December 11, 1966.
Yes, the defense can return a missed field goal for a touchdown. However, the touchdown would be credited to the special teams and not to the defense since a field goal is considered a special teams play. The TD would be considered under the heading 'return of a missed field goal' and not a blocked kick nor punt return.
If a player catches a missed field goal attempt while in the field of play, he can return it for a touchdown, resulting in six points. After the touchdown, his team may kick the PAT (Point After Touchdown) and score another one point, or convert the two point conversion for two points.
11. Same as offense.
a 108 yard missed field goal return
Only if they make it. If they make it; it counts as a field goal attempt and a field goal make. If it is missed, it does not count as a missed field goal.
No. This would be considered a special teams TD similar to a kickoff return for a TD or punt return for a TD.
By returning missed field goals.
A block down field beyond the line of scrimmage
Where he or she just got tackled