Possible homework questions:
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Explain what happens to a freshwater fish when placed in a saltwater environment?
Give an example of how a biotic and an abiotic factor can affect an ecosystem.
How can a cell be affected by an abiotic factor?
List one example of an animal other than humans communicating with another animal.
What are benefits and costs of living in social groups?
Name some potential problems with a modification to a flowering plant that renders it
unable to produce a flower.
7. Why would a predator be at an advantage if they could mimic signals given by their
prey?
8. How do predator prey relationships change over time?
9. What factors contribute to the increase in the human population size?
10. What factors affect the types and abundances of species in a community?
11. What determines the size of a population and its growth rate?
12. What is a biogeochemical cycle? (cool word )
13. What is the trophic level of an ecosystem?
14. How does energy flow affect food chains and food webs?
15. How does energy flow through ecosystems?
16. What is biodiversity?
17. Does evolution occur in recognizable patterns?
18. Name three things that can affect population dynamics in an ecosystem.
19. How does a population’s genetic diversity become reduced?
20. Explain the effects of extinction of one species within an ecosystem.
21. Explain what might happen to an ecosystem if mutations and natural selection no longer
exist.
22. Explain the importance of a keystone species in an ecosystem.
23. How can a desirable trait in a population ultimately decrease biodiversity?
AP Practice Essays
1. Analyze the organization of an ecosystem by describing trophic levels. Include how
tropic levels are divided, how energy flows through them, and the relationships
between levels.
2. Discuss for types of direct interactions that involve two species. Include an example of
each relationship.
3. The food web below represents the organisms of a large community. The arrows thow
the direction of energy glow in the system. For example the arrow points from the harp
seal to the cod because the seal obtains energy from the cod. Categorize the animals
according to their trophic level and means of obtaining energy.
Cod
↓
↓
Phytoplankton ->
->
 Krill
↖
Killer Whale
↖
↓
↖
↓
↖ Harp Seal