Answer:
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?
I have wheels and flies yet I am not an aircraft.
What can be cracked before it's used?
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see, and I'm neat and tidy, as can be. What am I?
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
Give it food and it will live, give it water and it will die.