Question 1

Dessication is the biggest issue for rocky shore benthos living in the ________.

Accepted Answer

A)   pelagic zone
B)   neritic zone
C)   supralittoral
D)   littoral
E)   sublittoralF) A) and B)
G) C) and D)

Question 2

Human activities are among the greatest threats to the world's coral reefs.

Accepted Answer

A) True 
 B)False

Question 3

The stem is the part of seaweeds that connects the blade to the holdfast.

Accepted Answer

A) True 
 B)False

Question 4

Benthic organisms living in the bottoms of trenches live in the ________ zone.

Accepted Answer

A)   bathyal
B)   sublittoral
C)   abyssal
D)   hadal
E)   supralittoralF) B) and D)
G) None of the above

Question 5

Seafloor organisms modify their habitat and create new habitats for other organisms.

Accepted Answer

A) True 
 B)False

Question 6

Zooxanthellae are highly specialized cyanobacteria that form a symbiotic relationship with corals.

Accepted Answer

A) True 
 B)False

Question 7

In Washington State, the ________ acts as a keystone predator; when removed, biodiversity ________ .

Accepted Answer

A)   sea star; decreases
B)   sea otter; decreases
C)   mussel; increases
D)   sea star; increases
E)   mussel, decreasesF) B) and C)
G) A) and D)

Question 8

Sessile organisms live attached to the seafloor.

Accepted Answer

A) True 
 B)False

Question 9

Zooxanthellae are ________.

Accepted Answer

A)   dinoflagellates living in tropical corals
B)   copepods feeding on diatoms and dinoflagellates
C)   bacteria associated with hydrothermal vents
D)   the same thing as krill
E)   members of the meroplanktonF) D) and E)
G) C) and D)

Question 10

Vent communities have been discovered making use of many energy sources, including all of the following except ________.

Accepted Answer

A)   hydrothermal vents
B)   methane seeps
C)   salt seeps
D)   radioactive seeps
E)   cold seepsF) D) and E)
G) A) and E)

Question 11

Macroalgae take advantage of surface/volume ratios by exposing wide, flattened blades to sunlight and nutrient-rich water.

Accepted Answer

A) True 
 B)False

Question 12

Marine vascular flowering plants include all of the following except ________.

Accepted Answer

A)   mangroves
B)   kelps
C)   seagrasses
D)   cord grass
E)   surf grassF) A) and E)
G) A) and D)

Question 13

Common deep-sea vent communities include all of the following except ________.

Accepted Answer

A)   filter-feeding clams and mussels
B)   fish
C)   crabs
D)   deep-water corals
E)   tubewormsF) D) and E)
G) B) and D)

Question 14

Macroalgae/seaweeds can be best differentiated from true plants because macroalgae/seaweeds ________.

Accepted Answer

A)   are photosynthetic
B)   are prokaryotic
C)   have no true roots, leaves, or stems
D)   have no chlorophyll
E)   are mostly unicellularF) A) and B)
G) A) and C)

Question 15

Water must be warmer than ________ degrees Centigrade to support a reef of corals with zooxanthellae.

Accepted Answer

A)   15
B)   18
C)   23
D)   25
E)   30F) A) and B)
G) A) and C)

Question 16

Episodes of coral bleaching have become more frequent and more severe in the last 20 years.

Accepted Answer

A) True 
 B)False

Question 17

Eel grass is a marine plant.

Accepted Answer

A) True 
 B)False

Question 18

Which organisms burrow into the deep-ocean muds in a process called bioturbation?

Accepted Answer

A)   starfish
B)   sponges
C)   sea cucumbers
D)   clams
E)   sea urchinsF) None of the above
G) A) and C)

Question 19

The stable conditions of deep benthic environments seem to favor ________ infaunal organisms.

Accepted Answer

A)   carnivorous
B)   surface-dwelling
C)   deposit-feeding
D)   symbioticE) None of the above
F) A) and B)

Question 20

Few algae are found growing on gravel and sand beaches.

Accepted Answer

A) True 
 B)False

Exam 14: The Benthos: Living on the Sea Floor

Dessication is the biggest issue for rocky shore benthos living in the ________.

Correct AnswerverifiedShow Answer

Macroalgae/seaweeds can be best differentiated from true plants because macroalgae/seaweeds ________.

Correct AnswerverifiedShow Answer

In Washington State, the ________ acts as a keystone predator; when removed, biodiversity ________ .

Correct AnswerverifiedShow Answer

Episodes of coral bleaching have become more frequent and more severe in the last 20 years.

Correct AnswerverifiedShow Answer

Zooxanthellae are ________.

Correct AnswerverifiedShow Answer

Vent communities have been discovered making use of many energy sources, including all of the following except ________.

Correct AnswerverifiedShow Answer

Common deep-sea vent communities include all of the following except ________.

Correct AnswerverifiedShow Answer

The stable conditions of deep benthic environments seem to favor ________ infaunal organisms.

Correct AnswerverifiedShow Answer

Benthic organisms living in the bottoms of trenches live in the ________ zone.

Correct AnswerverifiedShow Answer

The stem is the part of seaweeds that connects the blade to the holdfast.

Correct AnswerverifiedShow Answer

Eel grass is a marine plant.

Correct AnswerverifiedShow Answer

Which organisms burrow into the deep-ocean muds in a process called bioturbation?

Correct AnswerverifiedShow Answer

Water must be warmer than ________ degrees Centigrade to support a reef of corals with zooxanthellae.

Correct AnswerverifiedShow Answer

Sessile organisms live attached to the seafloor.

Correct AnswerverifiedShow Answer

Zooxanthellae are highly specialized cyanobacteria that form a symbiotic relationship with corals.

Correct AnswerverifiedShow Answer

Macroalgae take advantage of surface/volume ratios by exposing wide, flattened blades to sunlight and nutrient-rich water.

Correct AnswerverifiedShow Answer

Marine vascular flowering plants include all of the following except ________.

Correct AnswerverifiedShow Answer

Seafloor organisms modify their habitat and create new habitats for other organisms.

Correct AnswerverifiedShow Answer

Few algae are found growing on gravel and sand beaches.

Correct AnswerverifiedShow Answer

Human activities are among the greatest threats to the world's coral reefs.

Correct AnswerverifiedShow Answer

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In Washington State, the acts as a keystone predator; when removed, biodiversity .

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