TAILIEUCHUNG - SAT II Biology Episode 2 Part 6

Tham khảo tài liệu 'sat ii biology episode 2 part 6', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | PRACTICE TEST 2 TEST 2 Continued 6. Which of the following is true for freshwater ecosystems A I. There is a seasonal mixing of materials. B II. During the year oxygen concentrations are vertically uniform. C III. Materials are recycled more quickly than in ocean ecosystems. A I only B II only C III only D I and III are both true. E II and III are both true. 7. Midlatitude lakes undergo mixing more than equatorial lakes because A the midlatitude lakes turn over twice a year. B midlatitude lakes develop a thermocline. C water is densest at 4oC. D all of the above. E they don t equatorial lakes have more mixing. 8. Which of the following statements about eutrophication is NOT true A It is caused by acid rain. B It is caused by the addition of nutrients to a water system. C It is most harmful when there is little flow through in the system. D Phosphorus is the main causal agent. E Humans are responsible for most eutrophication. 9. Which of the following statements about acid rain is true A I. Acid rain is caused by nitric acid and sulfuric acid. B II. Acid rain can damage plants directly. C III. Acid rain can cause magnesium and calcium to be leached from the soil. A I only B II only C III only D II and III are both true. E I II and III are all true. 10. Which of the following statements about the carbon cycle is NOT true A Carbon dioxide levels fluctuate during the year. B Carbon dioxide levels are rising because of consumption of fossil fuels. C Atmospheric carbon dioxide will eventually be transferred to the oceans. D Carbon dioxide levels are up because of the burning of forests. E Carbon dioxide levels can be reduced by cleaning the gases that leave the smokestacks of power generating facilities. GO ON TO THE NEXT PAGE Peterson s SAT II Success Biology E M Ẽ70 PRACTICE TEST 2 TEST 2 Continued 11. Consider the following diagram illustrative of the species richness equilibrium. Rate of arrival of new species LU Number of species 1. Questions 77-79

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