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Multiple Choice Quiz
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1

Which of the following is not a major subdivision of the biosphere?
A)Hydrosphere
B)Lithosphere
C)Stratosphere
D)Atmosphere
2

A/an ______ is defined as a collection of populations sharing a given habitat.
A)Biosphere
B)Community
C)Biome
D)Ecosystem
3

The quantity of available nutrients ______ from the lower levels of the energy pyramid to the higher ones.
A)Increases
B)Decreases
C)Remains stable
D)Cycles
4

Photosynthetic organisms convert the energy of ______ into chemical energy.
A)Electrons
B)Protons
C)Photons
D)Hydrogen atoms
5

Which of the following is considered a greenhouse gas?
A)CO2
B)CH4
C)N2O
D)All of these
6

The Calvin cycle operates during which part of photosynthesis?
A)Only the light reaction
B)Only the dark reaction
C)Both light and dark reactions
D)Only photosystem I
7

Root nodules contain ______, which can _______.
A)Azotobacter, fix N2
B)Nitrosomonas, nitrify NH3
C)Rhizobia, fix N2
D)Bacillus, denitrify NO3
8

Which elements have an inorganic reservoir that exists primarily in sedimentary deposits?
A)Nitrogen
B)Phosphorus
C)Sulfur
D)B and C
9

The floating assemblage of microbes, plants, and animals that drifts on or near the surface of large bodies of water is the _______ community.
A)Abyssal
B)Benthic
C)Littoral
D)Plankton
10

An oligotrophic ecosystem would be most likely to exist in a/an
A)Ocean
B)High mountain lake
C)Tropical pond
D)Polluted river
11

Which of the following does not vary predictably with the depth of the aquatic environment?
A)Dissolved oxygen
B)Temperature
C)Penetration by sunlight
D)Salinity
12

Which of the following would be least accurate in detecting coliform bacteria in a water sample?
A)The presumptive MPN test
B)The standard plate count
C)The membrane filter method
D)The confirmatory MPN test
13

Milk is usually pasteurized by
A)The high-temperature short-time method
B)Ultrapasteurization
C)Batch method
D)Electrical currents
14

The dried, presprouted grain that is soaked to activate enzymes for beer is
A)Hops
B)Malt
C)Wort
D)Mash
15

Substances given off by yeasts during fermentation are
A)Alcohol
B)Carbon dioxide
C)Organic acids
D)All of these
16

Which of the following is added to facilitate milk curdling during cheese making?
A)Lactic acid
B)Salt
C)Lactobacillus
D)Rennin
17

A food maintenance temperature that generally will prevent food poisoning is
A)Below 4 degrees C
B)Above 6 degrees C
C)Room temperature
D)Both a and b
18

Secondary metabolites of microbes are formed during the _____ phase of growth.
A)Exponential
B)Stationary
C)Death
D)Lag





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