Deck 23: Microorganisms in the Environment and Effects on Human Health

Question 1

The most abundant microbe population in soil consists of

A)protozoans.
B)helminths.
C)bacteria.
D)fungi.

Answer 1

C

Question 2

Which of the following zones is present only in oceans?

A)Abyssal zone
B)Benthic zone
C)Littoral zone
D)Profundal zone

Answer 2

A

Question 3

The process by which nitrate is reduced to nitrogen is called

A)nitrification.
B)denitrification.
C)anammox.
D)deamination.

Answer 3

B

Question 4

The conversion of CO₂ to organic molecules is called __________.

Question 5

Which of the following is the sixth most abundant element in the universe?

A)Nitrogen
B)Oxygen
C)Carbon
D)Hydrogen

Question 6

All of the following are free-living nitrogen-fixing bacteria except

A)Clostridium.
B)Bacillus.
C)Rhizobium.
D)Azotobacter.

Question 7

Which of the following is a Category A agent?

A)Bacillus anthracis
B)Escherichia coli
C)Vibrio cholerae
D)Chlamydia psittaci

Question 8

The physical location where organisms are found is called a(n)__________.

Question 9

Cholera is considered a Category __________ disease.

Question 10

A region or regions of the earth populated by living organisms is/are referred to as the __________.

Question 11

The most lethal form of anthrax is

A)inhalation anthrax.
B)cutaneous anthrax.
C)gastrointestinal.
D)nasopharyngeal.

Question 12

Eutrophication is a term used in the

A)carbon cycle.
B)phosphorus cycle.
C)sulfur cycle.
D)oxygen cycle.

Question 13

The process by which amino groups are converted to ammonia is referred to as __________.

Question 14

Which of the following diseases was declared by the WHO in 1980 to be eradicated?

A)Mumps
B)Pertussis
C)Smallpox
D)Botulism

Question 15

The majority of marine microorganisms are present in the

A)benthic zone.
B)littoral zone.
C)profundal zone.
D)limnetic zone.

Question 16

Category B agents would include

A)Vibrio cholerae.
B)Yersinia pestis.
C)Francisella tularensis.
D)Clostridium botulinum.

Question 17

Which of the following processes is most commonly used in wastewater treatment?

A)Sulfur
B)Anammox
C)Phosphorus
D)Carbon dioxide

Question 18

Which of the following is not found in the atmosphere?

A)Carbon dioxide
B)Nitrogen
C)Sulfur
D)Phosphorus

Question 19

A set of guilds is referred to as a

A)microhabitat.
B)biosphere.
C)community.
D)population.

Question 20

Specific small niches in which populations and guilds within a community reside are referred to as

A)habitats.
B)biospheres.
C)ecosystems.
D)microhabitats.

Question 21

The bacterial genus Rhizobium is involved primarily in the __________ cycle.

Question 22

EPA stands for __________.

Question 23

Match the description below with the correct item from this list.
a.Biomass
b.Eutrophication
c.Denitrification
d.Thiobacillus
e.Yersinia
f.Biodiversity
g.Rhizobium
Quantity of all organisms in an ecosystem

Question 24

Match the description below with the correct item from this list.
a.Biomass
b.Eutrophication
c.Denitrification
d.Thiobacillus
e.Yersinia
f.Biodiversity
g.Rhizobium
Number of species living in a given ecosystem

Question 25

Viral hemorrhagic fevers (VHFs)are caused by four families of __________ viruses.

Question 26

The incubation time for Ebola is 2 to __________ days.

Question 27

Match the description below with the correct item from this list.
a.Biomass
b.Eutrophication
c.Denitrification
d.Thiobacillus
e.Yersinia
f.Biodiversity
g.Rhizobium
Overgrowth of microbes in nutrient-rich waters

Question 28

Match the description below with the correct item from this list.
a.Biomass
b.Eutrophication
c.Denitrification
d.Thiobacillus
e.Yersinia
f.Biodiversity
g.Rhizobium
Symbiotic nitrogen-fixing

Question 29

Match the description below with the correct item from this list.
a.Biomass
b.Eutrophication
c.Denitrification
d.Thiobacillus
e.Yersinia
f.Biodiversity
g.Rhizobium
Sulfur dissimilation

Question 30

Brucellosis is a Category __________ disease.