Answer:
My teeth are sharp my back is straight to cut things up it is my fate.
I have leaves on my fruit my fruit is on my leaves.
I am a word. I become longer when the third letter is removed.
Send poorly behaved children to me and let them sit here.
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?