chapter+questions

Chapter 3 questions

1. Atipping point in the disapearence of the topical rainforests would be (B) the clearing of rain forests for agricultural lands that adds carbon dioxide to the atmosphere

2. A group of cats known as felis concolor, living and interbreeding in one area at the same time, is known as (C) a population

3. Which of the activities below is not an important ecological role of insects? (B) helping to control the population of insects by eating them

4. A greenhouse gas emitted by methane (E) methane

5. can be stored in marine sediments for long periods of time (D) phosphate

6. a greenhouse gas emitted into the atmosphere through transpiration or evaporation (C) water

7. a limiting factor for most plant growth in lakes and terrestrial sytstems (A) nitrogen

8. organisms live within a range of tolerence that determines where they live (B) coral polyps need symbolic algae living within them.

9. (A) 0.6 m2

10. the end product of the wood in a log being decomposed by fungi is (E) carbon monoxide gas

11. Which of the folloing statements is not a human intervention in the nitrogen cycle? (D) large amounts of nitrates are added to the chesapeake Bay causing eutrophic dead zone

12. Which of the following cycles does not include an atmospheric component (B) water

13. The promary means by which humans intervene with the sulfur cycle is (A) by burning coal and releasing sulfur dioxide into the atmosphere that can cause acid rain deposition.