Chapter 21.2 Review 1. Describe the characteristics of the kingdoms of prokaryotes?

2. In what ways do prokaryotes differ from one another?

3. List three ecological roles of prokaryotes.

4. What are two ways that bacteria cause disease?

5. Why are emerging diseases of particular concert?

6. Apply Scientific Reasoning You think you might have a bacterial infection. Would you Ask for a vaccination against the bacteria? Why or Why not?

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.