Pretty sure the answer is Sugar, Correct me if I'm wrong
The answer is A- double carbon bond
The answer is the third one, mitochondrial DNA can be traced for generations. this is because geneticists could trace back mitochondrial adam and mitochondrial eve.
Light microscopy allows microscopist to view dynamic processes in living cells because both live and dead specimens can be viewed. Electron microscopes cannot for the view of living specimens because they use electrons that are destructive to cell. On the other hand, light microscopes use visible light and magnifying lenses to examine specimens.