1. Answers will vary but should included comments about differences in climate and geology.
2. Primary succession -- habitat previously unoccupied. Secondary succession -- after a disturbance.
3. Answers will vary but should follow the information given on pages 856 to 858.
4. An ecosystem consists of a biotic community and its physical environment.
5. Ecosystem with characteristic physical and chemical conditions.
6. A food web shows who eats what or whom.
7. Vegetarian eats at the second trophic level; meat eater eats at third and/or fourth trophic level.
8. Answers will vary.
9. Gross primary production -- amount of solar or geochemical energy in a certain time period in a given region. Net primary production -- energy left over for growth and reproduction after plant cellular respiration.
10. Answers will vary.
11. Energy transfer from one level to the next via living organisms in a given circumstance.
12. Follow Figures 42.12 through 42.15.
TO THINK ABOUT
1. Answers will vary but should include some sort of environmental impact statement. What will happen to the whales?
2. Countless bacteria, viruses, protists, and fungi all living there in a constant influx of food.
3. Bioaccumulation and biomagnification.
4. Answers will vary. Be aware of overly simple statements.
5. Answers will vary. Be certain students see both sides of this issue.
6. Answers will vary but should include the statement that the organisms that can adapt will make it and pass on those genes. Adaptation includes the ability to survive not only with the environment but also with the other organisms that may be present.
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