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Multiple Choice Quiz
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1

Which of the following are not members of the phytoplankton?
A)diatoms
B)coccolithophores
C)silicoflagellates
D)radiolarians
E)none of the above
2

The dominant phytoplankton from the polar zone to the temperate zone are the:
A)diatoms.
B)coccolithophores.
C)foraminiferans.
D)radiolarians.
E)dinoflagellates.
3

Dinoflagellates obtain their nourishment by:
A)photosynthesis.
B)the direct ingestion of organic material.
C)chemosynthesis.
D)A and B
E)all of the above
4

Zooplankton are:
A)herbivores.
B)carnivores.
C)omnivores.
D)A and B
E)A, B, or C
5

Baleen whales feed mainly on:
A)copepods.
B)krill.
C)chaetognaths.
D)radiolarians.
E)foraminiferans.
6

Plankton cells are autotrophic. This means they:
A)are self-feeding.
B)move independently of each other.
C)reproduce asexually.
D)require normal salinity.
E)require sunlight.
7

The smallest plankton are the:
A)nannoplankton.
B)microplankton.
C)ultraplankton.
D)net plankton.
E)meroplankton.
8

A rapid increase in phytoplankton population that can discolor the water is called a:
A)growth spurt.
B)bloom.
C)explosion.
D)expansion.
E)inundation.
9

Zooplankton are:
A)herbivores.
B)carnivores.
C)omnivores.
D)all of the above
E)none of the above
10

Some phytoplankton have whip-like appendages called ______ that are used for limited mobility.
A)tails
B)wings
C)swooshes
D)limbs
E)flagella
11

Baleen whales feed on:
A)krill.
B)euphausids.
C)coccolithophores.
D)diatoms.
E)A and B above
12

Copepods and euphausids double their populations ______ each year.
A)once
B)ten to fifteen times
C)three to four times
D)six to eight times
E)about ten times
13

Jellyfish are members of a group of animals called:
A)Coelenterata or Cnidaria.
B)Tintinnids.
C)Ctenophores.
D)Chaetognaths.
E)Euphausia.
14

Zooplankton that spend only a portion of their lives as plankton are called:
A)holoplankton.
B)meroplankton.
C)benthoplankton.
D)auxoplankton.
E)ctenoplankton.
15

Which of the following organisms spend a portion of their lives as plankton?
A)snails
B)barnacles
C)starfish
D)crabs
E)All of the above are correct.
16

The most numerous organisms in the oceans are the:
A)nekton.
B)phytoplankton.
C)benthos.
D)zooplankton.
E)bacteria.
17

Organisms that thrive under conditions that would be fatal to most other lifeforms are called:
A)auxophiles.
B)dangerphiles.
C)hazardoids.
D)extremophiles.
E)none of the above
18

Viruses:
A)are highly successful parasites.
B)are unable to carry on metabolic processes by themselves.
C)can only replicate inside of a host cell.
D)may infect planktonic bacteria.
E)can do all of the above.
19

Toxic blooms of single-celled organisms that discolor the water are often called:
A)green floods.
B)red tides.
C)brown pools.
D)blue slicks.
E)yellow stains.
20

A concentration of zooplankton in a thin layer along a pycnocline or at a preferred light intensity:
A)can reflect sound.
B)is called a deep scattering layer.
C)can provide a rich food source for carnivorous phytoplankton.
D)can do A and B above.
E)can do none of the above.





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