Name____________________________Final
Exam, biology 44,
Answer all questions. Each question is worth 5 points.
1. What is the difference between allopatric and sympatric speciation?
2. In which groups of organisms is sympatric speciation most likely to occur? Why??
3. What are the characteristics of an “r” species (list 3)?
4. Explain why competition between closely related organisms leads to evolution
5. Are animals altruistic?? Discuss.
6. Habitat Conservations Plans (HCP’s) contain a “No surprises” clause. What is this
clause and why is it important to the process.
Define or identify the following
7. keystone species
8. sibling species
9. protostome
10. prokaryote
11. pleiotropy
12. eutrophication
13. neutral mutation
14-15.Very little variation is found in a large population of organisms. Give two possible
explanations for this. Can you tell which is correct by looking at the situation the organisms are in?
17. How, exactly, does sewage cause fish death in a stream?
18. Why are tropical plant communities more sensitive to fire than temperate plant communities?
19. Why, in our local area, is fire prevention bad biologically for natural communities?
20. Explain the forces or process that allows water to rise in trees.
21. How are viruses classified according to the 6 kingdom system?
22. What level of government has jurisdiction over birds? Why?
23. Describe what is meant in biological terms by sustained yield.
24. Both deer and trees are harvested on a sustained yield basis. Does this result in
maintaining forests and deer populations in a natural state? Why or why not.
Describe the mechanism that explains why each of the following behaviors occurs
25. A bird tries to incubate a light bulb.
26. A male animals fights another male of the same species and dies in the process.
27. A dog, punished by its owner, attacks the family cat.
28. When and why is
29. As a general rule, would you expect flowering trees to have larger or smaller flowers
than flowering annual plants? Why
30. Would you expect annual plants in a desert to have larger or smaller flowers than
annual plants in the tropics? Why?
For each of the following, tell which category might be expected to have the most endangered species, and why.
31. r vs k species
32. high vs low trophic level (food chain level)
33. coastal sage vs desert species
34. fresh water vs ocean species
35. temperate area vs tropical area species.
36. birds vs fish
37. Does the presence of organic molecules, found in rocks on Mars, indicate that live
once lived or is now living on Mars? Why or why not?
DDT, designed to kill insects, in high dosage, harms birds.
38. Explain, in ecological terms, why this occurs. (how DDT gets into birds).
39. Explain, in biochemical terms, how DDT causes birds damage.
40. The development of the college campuses has caused a decrease in many species but
has also caused some native forms of life to increase. What categories are more
common, and why?