Which of these is not a bone in the middle ear?
Correct answer: Utricle

I am not a number.
Arohanui, I know that it's quite hard to find this for yourself. Here's what an utricle is.
"the larger of the two fluid-filled cavities forming part of the labyrinth of the inner ear (the other being the sacculus). It contains hair cells and otoliths which send signals to the brain concerning the orientation of the head".

wanderer
new info for me.thanks