It's either nothing or no. If it's no it makes sense but is a waste of pixel space. If it is nothing, I've seen a different version of this cheesy riddle, but it was better worded. "Nothing" does NOT turn Polar Bears white, Polar Bears skin is black or tan I believe, their clear hairs reflect the snow.
If you read it really carefully its easy, the answer is
It would appear to be that easy, but the question can be guessed. So the answer would be yes, it's a stupid riddle with a large hole in the logic. It could better worder to be "Do you know the answer to the riddle?"