Unit #3 Exam Review Quiz 2014, 2015

Grade:«grade»

Subject:«subject»

Date:«date»

1 Microbes account for about ________% of all the biological mass on Earth.

A 98%

B 75%

C 50%

D 22%

2 Which chemical is commonly used to disinfect American water sources

A Ethyl-alcohol

B A combination of chloride & alcohol

C Fluorine

D Chlorine

3 Which of the following is considered an indicator species:

A daphnia

B hydra

C diatoms

D amoebas

4 Which 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

5 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

6 Which 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

7 The 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

8 H2CO3 is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

9 Out 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%

10 What percent of aquatic species are considered benthic?

A 5%

B 25%

C 60%

D 98%

11 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

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 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

13 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

14 At a neutral pH, which molecule is in the highest concentration

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

15 CO3

2- is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

16 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.

17 HCO3

- is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

18 Which 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

19 Which of the following is an example of molecular dissociation:

A H+ + OH- --> H2O

B H2O --> H+ OH-

C Fe + CuSO4 --> Cu + FeSO4

D AgNO3 + HCl --> HNO3 + AgCl

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

A NH4

+ --> NO2

-

B NO2

- --> NO3

-

C NO3

- --> N2

D N2 --> NH4

+

21 All 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

22 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

23 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

24 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

25 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.

26 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

27 What 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

28 The 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

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

30 In 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

31 Which 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

32 When a protozoan is stressed, it will form _______ as offpring.

A spores

B oocysts/cysts

C eggs

D capsids

33 Which of the following has crustaceans and cyclops as its intermediate host?

A Toxoplasmosis

B Salmonella

C Naegleria fowleri

D Dracunculiasis

34 How 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

35 If procholorcoccus were to suddenly vanish from the ocean, all of the following would be a likely consequence EXCEPT:

A atmospheric CO2 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