1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Populations Ecosystems Nutrient Cycles Species Interactions Food Webs

2. At what point does this curve demonstrate exponential growth? A B D C

4. Define ‘Carrying Capacity’

6. Give an example of a population (other than humans)

8. List four limiting factors.

10. List two density- dependent, biotic factors influencing population growth.

12. Define ‘Community’

14. Define ‘Habitat’

16. Define ‘Ecosystem’

18. What is the process diagram below called (be specific)?

20. Explain what is meant by ‘energy flows’ and ‘nutrients cycle.’

22. On the board, diagram the water cycle.

24. On the board, diagram the carbon cycle (include four forms/influences).

26. Where is most nitrogen on planet Earth found?

28. Explain three forms of nitrogen found on Earth.

30. What Type of Plants help with Nitrification?

31. HIV-AIDS is a virus that uses human cells to reproduce itself, destroying the human cells in the process. What type of interaction is demonstrated in this example?

33. Squirrels will feed on the eggs of birds. What type of interaction is this?

35. Some ducks fly from wetland to wetland, sometimes carrying seeds on their feet. The process helps the plants inhabit new wetlands. What type of species interaction is this?

37. In your gut, you have E. coli bacteria that help you digest your food. In return, they get a safe place to live, warmth, and supply of food. What type of interaction is this?

39. Give an example of commensalism.

41. Circle the Producers:

43. Circle Two Consumers:

45. Circle An Organism from the 3 rd Trophic Level:

47. If you start with 100,000 calories of energy at the level of producers, how much energy will be available for a tertiary consumer?

49. The rule of 10% states that most energy isn’t transferred from one trophic level to the next. Where does the ‘lost’ energy go?