1. Describe the function of systemin in plants.
2. What are R genes and how do they work?
3. Describe the hypersensitive response as completely as you can.
4. What is systemic acquired resistance?
5. Why don't plants have high levels of defense compounds all the time?
6. What is the risk of having a dynamic rather than a constitutive defense response?
7. Describe the recruitment of parasitoid wasps by plants and its role in plant defense.
8. Why did spines often evolve in areas that are dry or otherwise stressful?