1. Compare and contrast the advantages and disadvantages of life as an ectoparasite versus an endoparasite.

2. Why are parasites often not very harmful to hosts in their native range but highly detrimental to hosts in an introduced range?

3. What allows a parasite to jump to a new species of host?

4. If prions are not normally transmittable among cattle, what procedure caused the spread of mad cow disease?

5. What constitutes an emerging infectious disease?

6. Contrast horizontal versus vertical transmission of a parasite.

7. Using the basic S-I-R model of parasite and host dynamics, explain why the proportion of infected individuals in the population declines over time.

8. In the S-I-R model of parasite and host dynamics, how does the outcome change if we allow new susceptible individuals to be born into the population?

9. When using a t-test, what is an important assumption regarding the distribution of the data?

10. Explain why pathogens that are highly lethal to their hosts might become less lethal over time.