1. Unit #3 Exam Review Quiz 2014, 2015 Grade: «grade» Subject: «subject» Date: «date»

2. 1Microbes account for about ________% of all the biological mass on Earth. A 98% B 75% C 50% D 22%

3. 2Which chemical is commonly used to disinfect American water sources A Ethyl-alcohol B A combination of chloride & alcohol C Fluorine D Chlorine

4. 3Which of the following is considered an indicator species: A daphnia B hydra C diatoms D amoebas

5. 4Which of the following describes a microbe's prime niche A An environment that has a high amount of competition for resources B An environment that has enough nutrients for the microbe to survive C An environment that has enough nutrients for the microbe to thrive D An environment that lacks any usable nutrients and is inhospitable to microbes

6. 5The majority of water consumed by individuals as well as agriculture in the United States is: A Glacial melt B Groundwater C Permafrost D Desalinated ocean water

7. 6Which of the following would thrive on a hydrothermal vent: A A psychrophilic bacterium B A psychrotolerant bacterium C A barophilic bacterium D A barotolerant bacterium

8. 7The following image demonstrates: A high species richness but low abundance B high species abundance but low richness C high species richness and high species abundance D low species richness and low species abundance

9. 8H 2 CO 3 is A carbonate B bicarbonate C carbonic acid D carbon dioxide

10. 9Out of the small percentage of the planet's water that is fresh water, what percent can be found in ground water sources such as aquifers: A 68% B 50% C 44% D 30%

11. 10What percent of aquatic species are considered benthic? A 5% B 25% C 60% D 98%

12. 11All of the following are reasons why bacteria form biofilms EXCEPT: A Bacteria excrete adhesive cells to a surface to prevent the colony from being swept away B Bacterial biofilms allow for colonies to grow large enough to prevent phagocytosis C Bacterial biofilms alter the BOD of a system to prevent asphyxiation of higher level organisms D Bacterial biofilms allow the organisms to remain in favorable niches

13. 12All of the following are ways that contaminants can get into a water supply, EXCEPT: A chemicals leaking from an underground waste storage tank B vapors leaking from a surface waste storage tank that condenses into groundwater C pesticides running off from an industrial farm and travelling into a nearby river D multiple homes and businesses getting their well water from the same source of groundwater

14. 13A bacterium that undergoes a period of severe stress will form a ________ to keep its offspring alive. A cyst B capsid C oocyst D spore

15. 14At a neutral pH, which molecule is in the highest concentration A carbonate B bicarbonate C carbonic acid D carbon dioxide

16. 15CO 3 2- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

17. 16All of the following are reasons why bioremediation is being pursued as a viable method of spill clean up, EXCEPT: A It is relatively cheap when compared to other methods B Microbes can easily break down xenobiotics C Non-mobile organisms such as plants can be used to remove contaminants without having to worry about losing track of your organisms. D Over 90% of materials that are considered hazardous can be biodegraded.

18. 17HCO 3 - is A carbonate B bicarbonate C carbonic acid D carbon dioxide

19. 18Which of the following describes alkalinity: A A system’s ability to deal with the addition of a catalyst B A system’s ability to deal with the addition of hydroxide C The sum of all hydronium and hydroxide during the dissociation of water molecules D The sum of equivalents of all species that can neutralize an acid

20. 19Which of the following is an example of molecular dissociation: A H + + OH - --> H 2 O B H 2 O --> H + OH - C Fe + CuSO 4 --> Cu + FeSO 4 D AgNO 3 + HCl --> HNO 3 + AgCl

21. 20Which of the following reactions is responsible for fixing nitrogen: A NH 4 + --> NO 2 - B NO 2 - --> NO 3 - C NO 3 - --> N 2 D N 2 --> NH 4 +

22. 21All of the following are true about chlorine & chlorime byproducts (DBPs) EXCEPT: A it can destroy bacteria, viruses, and difficult to kill parasites such as Giardia B there is evidence that the byproducts of chlorine can cause birth defects C it can cause large/accelerated gestational age/growth D it can cause neural tube defects

23. 22Methemoglobinemia 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

24. 23Which 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

25. 24Which of the following is a likely result of a massive increase in biochemical oxygen demand of a body of water: A Asphyxiation of higher level organisms such as fish B Asphyxiation of photosynthetic organisms C An increase in higher level organisms such as fish D An increase in higher level organisms such as dolphins and whales

26. 25Which of the following is reason why xenobiotics can be more difficult to break down naturally: A Xenobiotics were designed to increase our fuel efficiency, thus they burn well. B Xenobiotics are known to bioaccumulate in small bodies of water. C Xenobiotics are relatively cheap to clean up. D Xenobiotics have never existed in nature, thus there is no naturally occurring microbe to break it down.

27. 26Which of the following letters represent the same element/compound in the carbonate buffering system: A B and D B G and H C F and E D C and D

28. 27What is the 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

29. 28The following image demonstrates: A high species richness but low abundance B high species abundance but low richness C high species richness and high species abundance D low species richness and low species abundance

30. 29 You discover an Achaea bacteria that is both barophilic and psychrophilic. This organism’s prime niche is most likely: A At the bottom of the ocean near a hydrothermal vent B At the bottom of the ocean far away from a hydrothermal vent C On the surface water of the ocean near shore D On the surface water of the ocean away from the shore

31. 30In 2014, the EPA released a study that said _____ states had various (260) pesticides in their ground water. A 15 B 33 C 42 D 48

32. 31Which of the following is FALSE about thermal pollution: A An increase in temperature causes an increase in bacterial growth B An increase in temperature yields an increase in secondary consumers C An increase of temperature causes a decrease in DO D Thermal pollution is often a result of using water sources to cool water/equipment associated with power plants

33. 32When a protozoan is stressed, it will form _______ as offpring. A spores B oocysts/cysts C eggs D capsids

34. 33Which of the following has crustaceans and cyclops as its intermediate host? A Toxoplasmosis B Salmonella C Naegleria fowleri D Dracunculiasis

35. 34How can you avoid exposure to Salmonella? A Eating organic food B Eating a diet heavy in eggs C Thoroughly cooking meat D Eating a vegetarian diet

36. 35 If procholorcoccus were to suddenly vanish from the ocean, all of the following would be a likely consequence EXCEPT: A atmospheric CO 2 would rise B oceanic dissolved oxygen would fall C a large percent of the base of the oceanic food chain would vanish D parasitic zooplankton would increase