Question 1

Some planktonic cyanobacteria have the ability to "fix" which of the following elements thus having a fertilizing effect on the marine environment similar to the ability of the land plants legumes?

Accepted Answer

A)   Oxygen
B)   Helium
C)   Hydrogen
D)   NitrogenE) B) and C)
F) A) and B)

Question 2

The plankton, benthos, and nekton are subdivisions of the

Accepted Answer

A)   seafloor.
B)   littoral.
C)   oceanic water column.
D)   organisms.
E)   continental shelf.F) B) and C)
G) B) and E)

Question 3

When primary productivity is high, standing crop remains high and nearly constant.

Accepted Answer

A) True 
 B)False

Question 4

The highest rates of productivity in temperate waters occur in

Accepted Answer

A)   spring.
B)   winter.
C)   summer.
D)   fall.
E)   Productivity is the same during all seasons.F) B) and C)
G) A) and D)

Question 5

All phytoplankton are capable of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 6

The coccoliths on the outside of coccolithophores are made of silica.

Accepted Answer

A) True 
 B)False

Question 7

Cyanobacteria are one of only a few organisms able to use nitrogen gas to make organic matter.

Accepted Answer

A) True 
 B)False

Question 8

Common photosynthetic pigments include all of the following except

Accepted Answer

A)   chlorophyll. a
B)   fucoxanthin.
C)   fluorescence.
D)   phycoerythrin.E) A) and C)
F) B) and C)

Question 9

When new marine phytoplankton biomass is produced by photosynthesis, dissolved carbon dioxide is converted to

Accepted Answer

A)   carbon dioxide gas.
B)   carbon dioxide solids.
C)   soluble inorganic compounds.
D)   organic carbon compounds.
E)   None of these are correct.F) C) and E)
G) C) and D)

Question 10

Autotrophic organisms are

Accepted Answer

A)   able to chemosynthesize.
B)   the base of the food web.
C)   able to photosynthesize.
D)   All of these are correct.
E)   None of these are correct.F) A) and E)
G) B) and C)

Question 11

Salt-tolerant plants include cordgrasses and mangroves.

Accepted Answer

A) True 
 B)False

Question 12

In the dark-light bottle experiment, which one of the following is measured in the dark bottle?

Accepted Answer

A)   Photosynthesis.
B)   Respiration.
C)   Decomposition.
D)   Photosynthesis plus respiration.
E)   Chlorophyll concentration.F) A) and B)
G) B) and D)

Question 13

In terms of grams of carbon per square meter per day, the open-ocean environment is about as productive as

Accepted Answer

A)   prairie land.
B)   alpine forests.
C)   deserts.
D)   intensively farmed fields.
E)   tropical rain forests.F) A) and C)
G) B) and E)

Question 14

Productivity is higher at a surface convergence than surface divergence.

Accepted Answer

A) True 
 B)False

Question 15

If baleen whales eat krill that eat diatoms, krill represents the _______ trophic level.

Accepted Answer

A)   first
B)   second
C)   third
D)   fourth
E)   fifthF) None of the above
G) A) and B)

Question 16

Krill is the common name for copepods.

Accepted Answer

A) True 
 B)False

Question 17

The most abundant phytoplankton in the open ocean is the cyanobacterium Prochlorococcus.

Accepted Answer

A) True 
 B)False

Question 18

Sargassum is the only large planktonic seaweed.

Accepted Answer

A) True 
 B)False

Question 19

The total productivity of upwelling areas is greater than the total productivity of open-ocean areas.

Accepted Answer

A) True 
 B)False

Question 20

The upper boundary of the aphotic zone is determined by the depth of solar light penetration.

Accepted Answer

A) True 
 B)False

Exam 12: The Plankton, Energy, and Food Webs

Common photosynthetic pigments include all of the following except

Correct AnswerverifiedShow Answer

All phytoplankton are capable of photosynthesis.

Correct AnswerverifiedShow Answer

When new marine phytoplankton biomass is produced by photosynthesis, dissolved carbon dioxide is converted to

Correct AnswerverifiedShow Answer

The most abundant phytoplankton in the open ocean is the cyanobacterium Prochlorococcus.

Correct AnswerverifiedShow Answer

Cyanobacteria are one of only a few organisms able to use nitrogen gas to make organic matter.

Correct AnswerverifiedShow Answer

Autotrophic organisms are

Correct AnswerverifiedShow Answer

The total productivity of upwelling areas is greater than the total productivity of open-ocean areas.

Correct AnswerverifiedShow Answer

Some planktonic cyanobacteria have the ability to "fix" which of the following elements thus having a fertilizing effect on the marine environment similar to the ability of the land plants legumes?

Correct AnswerverifiedShow Answer

Sargassum is the only large planktonic seaweed.

Correct AnswerverifiedShow Answer

Krill is the common name for copepods.

Correct AnswerverifiedShow Answer

The highest rates of productivity in temperate waters occur in

Correct AnswerverifiedShow Answer

When primary productivity is high, standing crop remains high and nearly constant.

Correct AnswerverifiedShow Answer

Productivity is higher at a surface convergence than surface divergence.

Correct AnswerverifiedShow Answer

If baleen whales eat krill that eat diatoms, krill represents the _______ trophic level.

Correct AnswerverifiedShow Answer

The upper boundary of the aphotic zone is determined by the depth of solar light penetration.

Correct AnswerverifiedShow Answer

The coccoliths on the outside of coccolithophores are made of silica.

Correct AnswerverifiedShow Answer

The plankton, benthos, and nekton are subdivisions of the

Correct AnswerverifiedShow Answer

Salt-tolerant plants include cordgrasses and mangroves.

Correct AnswerverifiedShow Answer

In the dark-light bottle experiment, which one of the following is measured in the dark bottle?

Correct AnswerverifiedShow Answer

In terms of grams of carbon per square meter per day, the open-ocean environment is about as productive as

Correct AnswerverifiedShow Answer

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