Look at the image below. List 1 biotic factor and 1 abiotic factor that you see in this image. Explain how one organism will compete for biotic and abiotic factors. Give at least 2 biotic and 2 abiotic factors that the 1 organism will compete for.

3. Compare the food chain and the food web below. Explain how biodiversity makes one of these more stable than the other. Be sure to use examples from the diagrams. Hint: How does biodiversity in an ecosystem increase organisms' chances of survival?

4. Look at the image below. If a virus wiped out the mussel population, explain what would happen to the other consumers? What are 2 other consumers? What would happen to the population of those consumers?

5. In an energy pyramid, which level has the most energy available? Why?

6. What is the role of the pioneer species?

7. Explain why primary ecological succession takes a lot longer than secondary succession.

8. Which type of succession is likely to occur after a natural disaster, such as a forest fire? Explain your reasoning.

9. Look at the following graph, which shows the average number of offspring had by mice per year with certain traits.

Based on the data, which traits are advantageous to the species?

10. A group of students prepared a table listing the types of reproduction that occur in several organisms.

Based on this information, which of the organisms can produce offspring that are genetically identical to the parent organism? Explain your reasoning.