Summary:
- Our own eukaryotic cells protect DNA in chromosomes with a nuclear membrane, make ATP with mitochondria, move with flagella (in the case of sperm cells), and feed on cells which make our food with chloroplasts.
- Bacterial (prokaryotic) cells are orders of magnitude smaller and have none of this complexity.
- What quantum leap in evolution created this vast chasm of difference?
- Eukaryotes evolved by 1.5 billion years ago, but our organelles probably descended from bacteria by evolution.