McGraw Hill
Glencoe Biology: Cell Discovery and Theory: Self Check Quiz
Take this self-checking, five question quiz over the discovery of cells and cell theory.
Cold Spring Harbor Laboratory
Dna From the Beginning: Higher Cells Have Ancient Dna
Eukaryotic cells have separate DNA from mitochondria and chloroplasts which indicates that they were once primitive cells on their own. This multimedia article includes animations, pictures, video, biographical information, and quiz...