Answer:
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
I have roots nobody sees. I am taller than trees. Up up I go but I never grow.
I can fall off a building and live but in water I will die.
I am useless when together but useful when I am broken apart. What am I?
I am in truth a yellow fork from tables in the sky by inadvertent fingers dropped the awful cutlery. Of mansions never quite disclosed and never quite concealed the apparatus of the dark to ignorance revealed.
A little house full of meat, no door to go in and eat.