They are suppossed to be there. Though not like you have them. Right now you have a whole in her head it looks like since you tried to apply transparancy to the eyebrow material. There is nothing behind there so you see an actual hole. What youneed to do is on the "upper Brow" apply a transparancy map. On the normal eyebrow you simply need to make sure it is the same color as the skin.. Right now it appears you don't have any textures loaded so tht would leave her bald looking but with a texture it works.