Envs 100 Final Exam Actual Topics With Answers

During the early to middle stages of ecological succession, what happens? {Ans: there is an increase in chemical storage}Mt. St. Helens erupted in 1980 and the lava covered a large portion of Washington State. Since then, small shrubs and plants have been slowly moving into the area. This is an example of {Ans: secondary succession}In box 5, what is the primary effect to the ecosystem? {Ans: fish kills}What is the principle drawback of broad spectrum pesticides? {Ans: toxicity to beneficial organisms and humans}Secondary pollutants differ from primary pollutants in that they are not {Ans: emitted directly into the air as primary pollutants}What is the relationship between farming and ecological succession? {Ans: farming keeps the land in an early successional stage}