- The female ovaries and the male testes are a part of which body system? Can these organs be members of more than one organ system? Why or why not?
- Identify three different ways that growth can occur in the human body.
- Oxygen, whose atomic number is eight has three stable isotopes: 16O , 17O, and 18 O. Explain what this means in terms of the number of protons and neutrons.
- Explain why CH4 is one of the most common molecules found in nature. Are the bonds between the atoms ionic or covalent?