Fact 1: Flagella help prokaryotes move. Fact 2: Cilia and flagella are composed of microtubules. Given the two facts above, what help prokaryotes move?

Pick your answer from: 1. maps 2. heat energy 3. microns 4. Energy 5. microbes 6. microtubules 7. sensory neurons 8. Chemical energy
The answer is:
6.