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This quiz covers essential topics in environmental microbiology, including hydrothermal vent products, stress responses in bacteria, nitrogen fixation, and pollution effects on ecosystems. Questions address the functions of various compounds, sources of nutrients, and impacts of human activities on water quality. Aimed at high school students, it encourages understanding of critical concepts necessary for biology and environmental science curricula. This resource is ideal for reinforcing knowledge and preparing for exams in grade-level science subjects.
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Unit #3 Quiz #5, 2013-2014 Grade: «grade» «subject» Subject: «date» Date:
1 Which of the following is NOT released by hydrothermal vents A heat B large tube worms C calcium ions D iron ions
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
3 HCO3- is A carbonate B bicarbonate C carbonic acid D carbon dioxide
4 The difinitive host for Toxoplasmosis is: A humans B cats C sheep D cattle
5 Which of the following reactions is responsible for fixing nitrogen: A NH4+ --> NO2- B NO2- --> NO3- C NO3- --> N2 D N2 --> NH3
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
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
8 Which of the following is the smallest living microbial contaminant: A virus B bacteria C protozoan D helminths
9 CO32- is A carbonate B bicarbonate C carbonic acid D carbon dioxide
10 Which chemical is commonly used to disinfect American water sources A Chlorine B Fluorine C A combination of chloride & alcohol D Ethyl-alcohol
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
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
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
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
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
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
