Answer:
I am a cave full of bones and the house of a worm.
I am known for my natural tuxedo and marching. What am I?
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
I am partially baked. I am not completely lit. I am a portion of the moon. I am lesser than full wit. I am a divider of the hour. I am not a total lie. I am a sibling through one parent.
I get dirty when wiping things clean. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.