Question 1

The water below the oxygen minimum layer has:

Accepted Answer

A) No oxygen at all. 
B) Only very small traces of oxygen. 
C) Some of the oxygen it had when it left the surface. 
D) Most of the oxygen it had when it left the surface. 
A) No oxygen at all. 
B) Only very small traces of oxygen. 
C) Some of the oxygen it had when it left the surface. 
D) Most of the oxygen it had when it left the surface. D

Question 2

The zone immediately below the bathyalpelegic zone is called the:

Accepted Answer

A) Abyssopelagic. 
B) Hadal pelagic. 
C) Subtidal. 
D) Subbathyal. 
E) Mesopelagic. 
A) Abyssopelagic. 
B) Hadal pelagic. 
C) Subtidal. 
D) Subbathyal. 
E) Mesopelagic. A

Question 3

An unknown fish has been brought to you to examine.This fish is black,relatively small with small eyes and weak,flabby muscles.This fish is most likely from the:

Accepted Answer

A) Mesopelagic (vertical migratory). 
B) Mesopelagic (vertical non-migrator). 
C) Epipelagic. 
D) Deep pelagic. 
E) Deep-sea benthic. 
A) Mesopelagic (vertical migratory). 
B) Mesopelagic (vertical non-migrator). 
C) Epipelagic. 
D) Deep pelagic. 
E) Deep-sea benthic. D

Question 4

The main oceanic thermocline is located:

Accepted Answer

A) In the mesopelagic. 
B) Above the mesopelagic. 
C) Below the mesopelagic. 
D) It varies since the thermocline disappears in the tropics. 
E) It varies since the thermocline moves up and down in the water column depending on the amount of oxygen. 
A) In the mesopelagic. 
B) Above the mesopelagic. 
C) Below the mesopelagic. 
D) It varies since the thermocline disappears in the tropics. 
E) It varies since the thermocline moves up and down in the water column depending on the amount of oxygen.

Question 5

The energy source for the bacteria that thrive around deep-sea hydrothermal vents is:

Accepted Answer

A) Hydrogen sulfide. 
B) Light. 
C) Heat from the hydrothermal vents. 
D) Detritus. 
E) Tube-worm tissues. 
A) Hydrogen sulfide. 
B) Light. 
C) Heat from the hydrothermal vents. 
D) Detritus. 
E) Tube-worm tissues.

Question 6

The presence of bioluminescent organs on the underside of mid-water fishes is involved in:

Accepted Answer

A) Counter shading. 
B) Enlargement of silhouette. 
C) Creating a transparency effect. 
D) Cryptic coloration. 
E) Counter illumination. 
A) Counter shading. 
B) Enlargement of silhouette. 
C) Creating a transparency effect. 
D) Cryptic coloration. 
E) Counter illumination.

Question 7

Bacteria thriving around deep-sea hydrothermal vents are:

Accepted Answer

A) Photosynthethic. 
B) Symbiotic. 
C) Heterotrophic. 
D) Parasitic. 
E) Chemosynthetic. 
A) Photosynthethic. 
B) Symbiotic. 
C) Heterotrophic. 
D) Parasitic. 
E) Chemosynthetic.

Question 8

An important feeding adaptation among deep-sea fishes:

Accepted Answer

A) Migration to shallower water to feed. 
B) Feeding on males,hence the term "male parasitism". 
C) Ability to eat prey bigger than themselves. 
D) Strong muscles that allow them to move fast to catch any available prey. 
E) Absence of a stomach. 
A) Migration to shallower water to feed. 
B) Feeding on males,hence the term "male parasitism". 
C) Ability to eat prey bigger than themselves. 
D) Strong muscles that allow them to move fast to catch any available prey. 
E) Absence of a stomach.

Question 9

Which of the following is least likely to be seen in a vertical non-migrating mesopelagic fish?

Accepted Answer

A) Weak bones 
B) Swim bladder 
C) Flabby muscles 
D) Small size 
E) Large eyes 
A) Weak bones 
B) Swim bladder 
C) Flabby muscles 
D) Small size 
E) Large eyes

Question 10

Recent discoveries have shown the Challanger Expedition and other 19th-century oceanographic expeditions assumption that the deep ocean had no ______________ was incorrect.

Accepted Answer

A) Sediments 
B) volcanic activity 
C) water movement 
D) biodiversity 
A) Sediments 
B) volcanic activity 
C) water movement 
D) biodiversity

Question 11

The most numerous organisms on the deep sea floor are:

Accepted Answer

A) Macrofauna. 
B) Epifauna. 
C) Endofauna. 
D) Meiofauna. 
E) Infauna. 
A) Macrofauna. 
B) Epifauna. 
C) Endofauna. 
D) Meiofauna. 
E) Infauna.

Question 12

The deep-sea scavengers include animals that feed on:

Accepted Answer

A) Deep-sea plankton. 
B) Bottom meiofauna. 
C) Particulate organic matter. 
D) Dead animals. 
E) Bacteria. 
A) Deep-sea plankton. 
B) Bottom meiofauna. 
C) Particulate organic matter. 
D) Dead animals. 
E) Bacteria.

Question 13

The condition that creates the largest problem for animals in the deep sea:

Accepted Answer

A) Salinity changes. 
B) Temperature changes. 
C) Pressure changes. 
D) Food availability. 
A) Salinity changes. 
B) Temperature changes. 
C) Pressure changes. 
D) Food availability.

Question 14

A chambered nautilus is a species of.

Accepted Answer

A) Cnidarian. 
B) Bathyopelagic fish. 
C) Deep ocean isopod. 
D) Cephalopod. 
A) Cnidarian. 
B) Bathyopelagic fish. 
C) Deep ocean isopod. 
D) Cephalopod.

Question 15

In addition to food,deep-water animals depend on the surface for:

Accepted Answer

A) Light. 
B) Carbon dioxide. 
C) Chlorophyll. 
D) Oxygen. 
E) All answers are correct. 
A) Light. 
B) Carbon dioxide. 
C) Chlorophyll. 
D) Oxygen. 
E) All answers are correct.

Question 16

The mesopelagic zone extends from about 200 m to about:

Accepted Answer

A) 300 m. 
B) 500 m. 
C) 1,000 m. 
D) 2,000 m. 
E) 4,000 m. 
A) 300 m. 
B) 500 m. 
C) 1,000 m. 
D) 2,000 m. 
E) 4,000 m.

Question 17

The mesopelagic zone refers to the ocean depths in which there is:

Accepted Answer

A) Enough light to support plant growth. 
B) No light at all. 
C) Dim light,but not enough for plant growth. 
D) Enough light for primary production by bacteria. 
E) Dim light,but enough to support only some hardy plants. 
A) Enough light to support plant growth. 
B) No light at all. 
C) Dim light,but not enough for plant growth. 
D) Enough light for primary production by bacteria. 
E) Dim light,but enough to support only some hardy plants.

Question 18

The giant deep-sea hydrothermal vent tubeworm feeds on:

Accepted Answer

A) Phytoplankton that utilize the heat for primary production. 
B) Detritus from vent deposits. 
C) Small bottom animals such as brittle stars. 
D) Deep-sea bottom fishes that cluster around the vents. 
E) It filter-feeds on chemosynthetic bacteria. 
A) Phytoplankton that utilize the heat for primary production. 
B) Detritus from vent deposits. 
C) Small bottom animals such as brittle stars. 
D) Deep-sea bottom fishes that cluster around the vents. 
E) It filter-feeds on chemosynthetic bacteria.

Question 19

Bioluminescence in mesopelagic organisms is produced by:

Accepted Answer

A) Photophores. 
B) Specialized cells. 
C) Secretions of lucifern. 
D) All answers are correct. 
E) Photophores and Specialized cells only. 
A) Photophores. 
B) Specialized cells. 
C) Secretions of lucifern. 
D) All answers are correct. 
E) Photophores and Specialized cells only.

Question 20

The deepest of ocean waters are classified as:

Accepted Answer

A) Bathypelagic. 
B) Hadal pelagic. 
C) Abyssopelagic. 
D) Mesopelagic. 
E) Lower epipelagic. 
A) Bathypelagic. 
B) Hadal pelagic. 
C) Abyssopelagic. 
D) Mesopelagic. 
E) Lower epipelagic.

The water below the oxygen minimum layer has:

The zone immediately below the bathyalpelegic zone is called the:

An unknown fish has been brought to you to examine.This fish is black,relatively small with small eyes and weak,flabby muscles.This fish is most likely from the:

The main oceanic thermocline is located:

The energy source for the bacteria that thrive around deep-sea hydrothermal vents is:

The presence of bioluminescent organs on the underside of mid-water fishes is involved in:

Bacteria thriving around deep-sea hydrothermal vents are:

An important feeding adaptation among deep-sea fishes:

Which of the following is least likely to be seen in a vertical non-migrating mesopelagic fish?

Recent discoveries have shown the Challanger Expedition and other 19th-century oceanographic expeditions assumption that the deep ocean had no ______________ was incorrect.

The most numerous organisms on the deep sea floor are:

The deep-sea scavengers include animals that feed on:

The condition that creates the largest problem for animals in the deep sea:

A chambered nautilus is a species of.

In addition to food,deep-water animals depend on the surface for:

The mesopelagic zone extends from about 200 m to about:

The mesopelagic zone refers to the ocean depths in which there is:

The giant deep-sea hydrothermal vent tubeworm feeds on:

Bioluminescence in mesopelagic organisms is produced by:

The deepest of ocean waters are classified as:

The Science of Marine Biology

The Sea Floor

Chemical and Physical Features of Seawater and the World Ocean

Fundamentals of Biology

The Microbial World

Multicellular Primary Producers: Seaweeds and Plants

Marine Animals Without a Backbone

Marine Fishes

Marine Reptiles, Birds, and Mammals

An Introduction to Marine Ecology

Between the Tides

Estuaries: Where Rivers Meet the Sea

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

Resources From the Sea

The Impact of Humans on the Marine Environment

The Oceans and Human Affairs

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Exam 16: The Ocean Depths

The water below the oxygen minimum layer has:

The zone immediately below the bathyalpelegic zone is called the:

An unknown fish has been brought to you to examine.This fish is black,relatively small with small eyes and weak,flabby muscles.This fish is most likely from the:

The main oceanic thermocline is located:

The energy source for the bacteria that thrive around deep-sea hydrothermal vents is:

The presence of bioluminescent organs on the underside of mid-water fishes is involved in:

Bacteria thriving around deep-sea hydrothermal vents are:

An important feeding adaptation among deep-sea fishes:

Which of the following is least likely to be seen in a vertical non-migrating mesopelagic fish?

Recent discoveries have shown the Challanger Expedition and other 19th-century oceanographic expeditions assumption that the deep ocean had no ______________ was incorrect.

The most numerous organisms on the deep sea floor are:

The deep-sea scavengers include animals that feed on:

The condition that creates the largest problem for animals in the deep sea:

A chambered nautilus is a species of.

In addition to food,deep-water animals depend on the surface for:

The mesopelagic zone extends from about 200 m to about:

The mesopelagic zone refers to the ocean depths in which there is:

The giant deep-sea hydrothermal vent tubeworm feeds on:

Bioluminescence in mesopelagic organisms is produced by:

The deepest of ocean waters are classified as:

The Science of Marine Biology

The Sea Floor

Chemical and Physical Features of Seawater and the World Ocean

Fundamentals of Biology

The Microbial World

Multicellular Primary Producers: Seaweeds and Plants

Marine Animals Without a Backbone

Marine Fishes

Marine Reptiles, Birds, and Mammals

An Introduction to Marine Ecology

Between the Tides

Estuaries: Where Rivers Meet the Sea

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

Resources From the Sea

The Impact of Humans on the Marine Environment

The Oceans and Human Affairs

Filters