1. Explain why predation is a strong selective pressure.
2. Explain how the structure and arrangement of alveoli make them well suited for their role in gas exchange.
3. What is the function of the loop of Henle, the collecting duct, and antidiuretic hormones in the urinary system?
4. What is the difference between the endocrine glands and the exocrine glands?
5. List the four parts of a neuron, and explain each ones special function.
6. Human cloning, is it ethical? Explain your reason for being for or against human cloning.