Unit #3 Quiz #3 2013-2014

Grade:«grade»

Subject:Aquatic Science

Date:«date»

1 Which 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

2 All 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.

3 When considering the carbonate buffering system, all of the following reactions involve hydronium, EXCEPT:

A HCO3- --> CO3

2-

B CO32- --> Limestone

C H2CO3 --> HCO3-

D CO32- --> HCO3

-

4 Prochlorococcus are

A responsible for 90% of the net primary production

B responsible for 50% of the net primary production

C responsible for 50% of cellular respiration in the ocean

D mostly barophilic

5 The removal of toxins, such as mercury & petroleum oil, by natural or man-made microbes is called:

A bioaccumulation

B remedioaccumulation

C accumuloremediation

D bioremediation

6 Which 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.

7 Approximately _______% of the planet's water is fresh water.

A 2.5

B 10

C 25

D 46

8 Which 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

9 Which of the following would be found on a hydrothermal vent:

A A psychrophilic bacterium

B A psychrotolerant bacterium

C A barophilic bacterium

D A barotolerant bacterium

10 The 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

11 Which of the following reactions is responsible for fixing nitrogen:

A NH4+ --> NO2

-

B NO2- --> NO3

-

C NO3- --> N2

D N2 --> NH3

12 All 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 condences 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

13 CO32- is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

14 All 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

15 Which of the following describes alkalinity:

A A system’s ability to deal with the addition of a catalystB 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