Answer:
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
I sleep when you are awake, I am awake when you fall asleep. I can fly but no feathers to aid my flight. What am I?
Light hides me and darkness kills me. What am I?
What kind of room has no doors or windows?
My teeth are sharp my back is straight to cut things up it is my fate.
The answer I give is yes, but what I mean is no. What was the question?