Lewis/Life - Answers to End-of-Chapter Questions

Chapter 43 - Answers to End-of-Chapter Questions

TO REVIEW

1. Terrestrial biomes -- Life forms, climate, soil. Freshwater aquatic biomes -- physical and chemical factors such as current and salinity. Marine biomes -- proximity to land.

2. For each of these other answers are possible.
a. Ability to compete for sunlight.
b. Ability to withstand changing salinity.
c. Ability to withstand changing salinity.
d. Ability to withstand changing water levels.
e. Ability to withstand cold.
f. Ability to withstand cold; damp acidic soils
g. Ability to withstand gravel, cold, and water.
h. Ability to withstand low water.

3. Vertical stratification defines layering of different plant species in the forest canopy. This is related to available light. Thermal stratification is based on temperature; the term is usually used in connections with lakes and ponds.

4. Answers will vary.

5. One answer: Rapid recycling of plants adapted to soil conditions.

6. Permanently frozen ground

7. Answers will vary.

8. Specific answers will vary but all should include the idea that the available sunlight decreases with the depth of the lake.

9. Follow Figure 43.12.

TO THINK ABOUT

1. Answers will vary.

2. Answers will vary.

3. Most are neritic. An argument could be made for certain reefs being oceanic.

4. A shift in the central locations of the tick-borne diseases to cooler areas would probably be noted. Tropical infections would probably spread to areas that had approximately the same climate as was optimal. It is uncertain if the illnesses would stay in the present tropics if those areas also warmed.

5. Answers about fire being natural will vary. Fires occur most often in the forest and grassland biomes.

6. Answers will vary.

7. Eutrophic

8. Answers will vary.

Back