Answer:
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
Grows from the ground, bushes and grass, leaves of yellow, red and brow, unruly plants, get the axe, trim the hedge back down.
I have an eye but cannot see, You'll head inside when you see me.
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
I am what remains when nothing is left.What am I?
I am your mother's brother's only brother in law. Who am I?