1. What is the pH of pure water at 150C and why? 2. What was Miller's experiment and what is its significance? 3. What are enantiomers and why are they important? 4. What is the "curve of knowns"? 5. What are trophic levels? 6. Why does selective concentration of isotopes occur? 7. Why do diverse ecosystems develop? 8. What is carrying capacity? 9. What are molecular clocks? How are they used to determine the evolutionary history? 10. What are the driving forces for the upward movement of water in a vascular plant?