A:
It just ain't so.
Resolutions are merely motions that are more formalized.
They are usually written, and sometimes have a preamble ("Whereas ...") section in addition to the resolution ("Resolved ...") section.
They are used when a motion is particularly long or complicated, or when more pomp is desired.
They are voted on once, just as a regular motion.
(And there is no requirement in RONR that motions to amend the bylaws be voted on thrice.)
They are almost invariably original main motions (as opposed to motions like Commit or Adjourn), motions to Amend Something Previously Adopted or motions to Rescind.
The affirmative decision on a regular motion is just as binding as that on a resolution.
There is no expiration at the end of a term.