The wolf no doubt. Wolves are larger, more aggressive, they have large, sharp teeth and they are predators by nature. Iguanas are not predators; they are herbivores and thus do not have predatory instincts. The one advantage that the iguana would have in not being detected would be that it blends into its surroundings very well and is often undetected.
It depends. If it is a gray wolf, then a wolf would win. But if it is a smaller type of wolf, then a hyena might win.
A single bear would win against a single wolf.
wolf
A wolf.
Wolf.
wolf
A wolf would eat it.
Wolf.
if it were a gray wolf then maybe the wolf would win.
At night the vampire would win but in the day the wolf would win. Actually... Mythologicly speaking if its a "werewolf", and not just a wolf. Then the werewolf would win because its supposidly the only thing a vampire is afraid of.
Ofcourse brown bear would win against a wolf one on one.
Most likely a wolf.