E. One cell contains more mitochondria than the other.
A "micrometer" is the best unit of measurement for measuring the size of an atom.
ANIMAL. It's because animals are living organisms. Also 6 letters! A-N-I-M-A-L!
Moraines are made of till. They form when a glacier stays in one place for a long time and deposits a pile of till, then it retreats and leaves a moraine.
