Unit #3 Quiz #5, 2013-2014

1. Unit #3 Quiz #5, 2013-2014 Grade: «grade» «subject» Subject: «date» Date:

2. 1 Which of the following is NOT released by hydrothermal vents A heat B large tube worms C calcium ions D iron ions

3. 2 A bacterium that undergoes a period of severe stress will form a ________ to keep its offspring alive. A cyst B capsid C oocyst D spore

4. 3 HCO3- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

5. 4 The difinitive host for Toxoplasmosis is: A humans B cats C sheep D cattle

6. 5 Which of the following reactions is responsible for fixing nitrogen: A NH4+ --> NO2- B NO2- --> NO3- C NO3- --> N2 D N2 --> NH3

7. 6 What is the required ratio of carbon to nitrogen to phosphorus that is ideal for bacterial growth: A 1:10:100 B 100:10:1 C 100:1:10 D 10:1:100

8. 7 Which of the following is NOT a source of nitrates in water sources: A A leaky septic system B Runoff from an organic farm C Animal waste D Water plants & algae

9. 8 Which of the following is the smallest living microbial contaminant: A virus B bacteria C protozoan D helminths

10. 9 CO32- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

11. 10 Which chemical is commonly used to disinfect American water sources A Chlorine B Fluorine C A combination of chloride & alcohol D Ethyl-alcohol

12. 11 Which of the following is NOT a correct statement concerning thermal pollution: A A decrease in thermal pollution will cause an increase in DO B A decrease in thermal pollution will cause an increase in bacterial growth C An increase in thermal pollution will cause a decrease in DO D An increase in thermal pollution will cause an increase in bacterial growth

13. 12 Methemoglobinemia causes ________ to bind to _______, blocking the uptake of oxygen & causing problems such as “blue baby” syndrome. A Ammonium, myoglobin B Ammonia, hemoglobin C Nitrate, myoglobin D Nitrite, hemoglobin

14. 13 Contamination of agricultural land by dissolved salts is problematic because: A The permeability of the agricultural soil is greatly reduced B The permeability of the agricultural soil is greatly increased C The permeability of water used for irrigation is greatly reduced D The permeability of water used for irrigation is greatly increased

15. 14 A molecule that will slow down a reaction/maintain a reaction, such as the carbonate system helping to maintain aquatic pH is known as A an acid B a base C a catalyst D a buffer

16. 15 Which of the following is the largest source of thermal pollution: A Power plants using local bodies of water to cool off their equipment B Plastics introduced during the chemical processing at energy plants C Water run-off from residential streets that collect oil D Water run-off from agricultural land

17. 16 At any given time 30% of the global population is infected with which of the following: A Trichinella B Platyhelminthes C Ascaris D Tapeworms