Uh not quite. The animals and plants and stones and electrons may have sinned, but since they don't have a spirit breathed into them by God, it doesn't matter.
And since Jesus is God manifest in the flesh, that verse does not apply to Him. He didn't fall short of the glory of Himself. :)
Exactly. The verse does not apply to Jesus because of some other piece of theology. The same goes for Mary; another piece of theology tells us something about Mary's innocence, and that helps us know how to interpret the "all" in this verse. That's why the verse does not prove that Mary sinned any more than it proves that Jesus sinned.
-A8
That's for the explanation - as I had sighed too deeply and passed out!