1. A student observes that she's always sleepy shortly after eating lunch, and she wants to be able to pay better attention in her mid-afternoon class. She tried doing 10 jumping jacks just before the class, but still felt sleepy around the middle of the class. The next day, she tried sipping water throughout the class and found that she could pay attention until the end of the class. The student now brings a water bottle to class. Identify how this student applied the scientific method to solve her problem. 2. The model of electrons orbiting around the nucleus like planets orbit the sun has been proven to be inaccurate. What’s a more accurate way to describe electron orbitals? 3. How do covalent bonds differ from ionic bonds? Describe how each of these bonds is formed. 4. Natural cycles circulate several resources. Describe the water cycle. What happens to water at each stage of the cycle, and what drives this cycle? 5. Toxoplasma is a protist that must infect cats to be able to reproduce. The infection doesn’t benefit cats and only rarely harms them. What type of symbiotic relationship is this, and why? 6. Compare and contrast the location and function of ribosomes in prokaryotic and eukaryotic cells. 7. Describe the structure of the plasma membrane. What structures are on the side of the membrane facing the environment, the side of the membrane facing the cell, and the inside of the membrane? 8. Compare and contrast aerobic and anaerobic respiration. Which process yields more ATP? What’s the final electron acceptor in each process? 9. Compare and contrast meiosis and mitosis. How many daughter cells are produced by each, and how many chromosomes do they have? In what contexts do meiosis and mitosis occur? 10. Explain why cell cycle regulators are critical to the health of an organism. What can happen if cell division is allowed to proceed without being regulated