1. Distinguish between the biotic community of an ecosystem and the abiotic environmental factors of an ecosystem.

2. Define and compare the terms species, population, and ecosystem. must be defined compared .

3. Name and describe the attributes of the two categories into which all organisms can be divided based on how they obtain nutrition.

4. Name and describe the roles of the three main trophic categories that make up the biotic structure of every ecosystem. Give three examples of organisms from each of the three categories.

5. Give four categories of consumers in an ecosystem and the role that each plays.

6. Describe the different members of the decomposition food web.

7. Differentiate among the concepts of food chain, food web, and trophic levels.

8. Relate the concept of the biomass pyramid to the fact that all heterotrophs depend on autotrophic production.

9. Food (whether plants or animals) is consumed by higher order consumers. Explain precisely what happens to all food once it is consumed by the organism. (That is, where does the food go, what does it do, where do it end up? What is the fate of food?)