Answer:
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
I tremble at each breath of air, and yet can heaviest burdens bear.
It is the great nemesis of the lactose intolerant.
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
What word is a plural, but when you add an "S" to the end, it becomes singular?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.