Answer:
I am wood that is neither hard straight or crooked
I spend the day at the window, go to the table for meals, and hide at night. What am I?
I break down buildings, I crumble mountains but you can't see me. What am I?
I tell people to be careful when handling boxes.
When the clock has no angle, I will own yesterday, tomorrow and tonight. What am I?
A doctor might remove one from the neck of a Dracula victim.