Question 1

In the Riftia-symbiont relationship, the benefit to the symbiont during mutualism includes ________.

Accepted Answer

A)   chemicals for chemosynthesis
B)   a habitat
C)   protection from predators/consumers
D)   All of these are correct.
E)   None of these is correct.F) A) and B)
G) All of the above

Question 2

Brown algae include ________.

Accepted Answer

A)   Ulva, or sea lettuce
B)   dinoflagellates
C)   kelp
D)   PorphyraE) B) and C)
F) B) and D)

Question 3

The key special chemical used by chemosynthetic communities at hot vents is ________.

Accepted Answer

A)   nitrate
B)   phosphate
C)   silicate
D)   hydrogen sulfide
E)   methaneF) A) and B)
G) B) and D)

Question 4

One adaptation of many intertidal invertebrates is to develop a rounded profile to minimize resistance to breaking waves.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following properties is likely to decrease in a small, shallow tide pool at low tide?

Accepted Answer

A)   oxygen
B)   carbon dioxide
C)   temperature
D)   acidity
E)   salinityF) A) and D)
G) C) and D)

Question 6

The size and shape of sediment particles influences both the ________, or amount of space between particles, and ________, the flow of water and gases.

Accepted Answer

A)   porosity; permeability
B)   porosity; rugosity
C)   permeability; inundation
D)   exchange; permeabilityE) A) and C)
F) B) and C)

Question 7

Animals that burrow into the seafloor are members of the epifauna.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is not true about deep-sea coral and tropical reef coral?

Accepted Answer

A)   They are both animals.
B)   They are both cnidarians.
C)   They both have polyps.
D)   They both have symbionts.
E)   All of these are correct.F) A) and B)
G) B) and E)

Question 9

Benthic microalgae are best adapted to living ________.

Accepted Answer

A)   in the rocky intertidal zone
B)   below the euphotic zone
C)   within shallow sandy or muddy environments
D)   in tidepoolsE) A) and B)
F) A) and C)

Question 10

A close relationship between unrelated organisms in which one organism benefits and the other is unaffected is known as ________.

Accepted Answer

A)   symbiosis
B)   commensalism
C)   parasitism
D)   mutualism
E)   symbiosis and commensalismF) B) and E)
G) C) and D)

Question 11

Symbiosis is defined as ________.

Accepted Answer

A)   the grouping of organisms according to their ability to cope with exposure and water loss
B)   a relationship between animals living on a mud flat and their environment
C)   the relationship between herbivores and the algae that they graze upon
D)   a close intimate relationship between two dissimilar organisms
E)   None of these is correct.F) A) and D)
G) B) and D)

Question 12

Intertidal communities have low productivity because of high wave activity.

Accepted Answer

A) True 
 B)False

Question 13

Most animals that live within the sand and mud feed on detritus.

Accepted Answer

A) True 
 B)False

Question 14

More than 75 percent of the benthic animals belong to the epifauna.

Accepted Answer

A) True 
 B)False

Question 15

Mangrove trees grow in swampy salt water along ________.

Accepted Answer

A)   temperate coasts
B)   crests of coral reefs
C)   coasts with heavy surf
D)   areas of extreme evaporation and high salinity
E)   tropical coastsF) C) and E)
G) A) and C)

Question 16

The base of the food chain in hydrothermal vent communities is phytoplankton.

Accepted Answer

A) True 
 B)False

Question 17

Algae form the base of the trophic system for hydrothermal vent communities.

Accepted Answer

A) True 
 B)False

Question 18

CLOD or Coral Lethal Orange Disease ________.

Accepted Answer

A)   attacks and kills coral polyps
B)   kills zooxanthellae causing bleaching
C)   kills algae that cement sand debris to form a hard surface reef
D)   kills clams and crabs on coral reefs
E)   attacks and kills coral polyps, kills zooxanthellae causing bleaching, and kills algae that cement sand debris to form a hard surface reefF) C) and D)
G) B) and C)

Question 19

Marine algae are found in which sequence from sea surface to deeper water?

Accepted Answer

A)   green, brown, red
B)   red, brown, green
C)   green, red, brown
D)   brown, green, red
E)   red, green, brownF) A) and C)
G) All of the above

Question 20

Blades are the photosynthetic organ of seaweed.

Accepted Answer

A) True 
 B)False

Exam 14: The Benthos: Living on the Sea Floor

Which of the following properties is likely to decrease in a small, shallow tide pool at low tide?

Correct AnswerverifiedShow Answer

More than 75 percent of the benthic animals belong to the epifauna.

Correct AnswerverifiedShow Answer

One adaptation of many intertidal invertebrates is to develop a rounded profile to minimize resistance to breaking waves.

Correct AnswerverifiedShow Answer

The key special chemical used by chemosynthetic communities at hot vents is ________.

Correct AnswerverifiedShow Answer

In the Riftia-symbiont relationship, the benefit to the symbiont during mutualism includes ________.

Correct AnswerverifiedShow Answer

A close relationship between unrelated organisms in which one organism benefits and the other is unaffected is known as ________.

Correct AnswerverifiedShow Answer

Brown algae include ________.

Correct AnswerverifiedShow Answer

CLOD or Coral Lethal Orange Disease ________.

Correct AnswerverifiedShow Answer

Mangrove trees grow in swampy salt water along ________.

Correct AnswerverifiedShow Answer

Marine algae are found in which sequence from sea surface to deeper water?

Correct AnswerverifiedShow Answer

The base of the food chain in hydrothermal vent communities is phytoplankton.

Correct AnswerverifiedShow Answer

The size and shape of sediment particles influences both the ________, or amount of space between particles, and ________, the flow of water and gases.

Correct AnswerverifiedShow Answer

Which of the following is not true about deep-sea coral and tropical reef coral?

Correct AnswerverifiedShow Answer

Benthic microalgae are best adapted to living ________.

Correct AnswerverifiedShow Answer

Most animals that live within the sand and mud feed on detritus.

Correct AnswerverifiedShow Answer

Blades are the photosynthetic organ of seaweed.

Correct AnswerverifiedShow Answer

Intertidal communities have low productivity because of high wave activity.

Correct AnswerverifiedShow Answer

Algae form the base of the trophic system for hydrothermal vent communities.

Correct AnswerverifiedShow Answer

Animals that burrow into the seafloor are members of the epifauna.

Correct AnswerverifiedShow Answer

Symbiosis is defined as ________.

Correct AnswerverifiedShow Answer

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The size and shape of sediment particles influences both the , or amount of space between particles, and , the flow of water and gases.

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