Question 1

Good examples of bar-built estuaries are found here:

Accepted Answer

A) Coast of Norway. 
B) Pacific coast of the United States. 
C) Atlantic coast of the United States. 
D) Chesapeake Bay. 
E) St.Lawrence River. 
A) Coast of Norway. 
B) Pacific coast of the United States. 
C) Atlantic coast of the United States. 
D) Chesapeake Bay. 
E) St.Lawrence River. C

Question 2

The food web in salt-marsh communities is characterized by high primary production.Most of this production is made available to other communities in the form of:

Accepted Answer

A) Plant tissue eaten by grazers. 
B) Plankton eaten by filter feeders. 
C) Detritus. 
D) Plants eaten by herbivores. 
E) Plants eaten by zooplankton. 
A) Plant tissue eaten by grazers. 
B) Plankton eaten by filter feeders. 
C) Detritus. 
D) Plants eaten by herbivores. 
E) Plants eaten by zooplankton. C

Question 3

Mangroves belong to one of the following groups:

Accepted Answer

A) Green algae. 
B) Brown algae. 
C) Seagrasses. 
D) Flowering plants. 
E) Kelps. 
A) Green algae. 
B) Brown algae. 
C) Seagrasses. 
D) Flowering plants. 
E) Kelps. D

Question 4

Euryhaline species:

Accepted Answer

A) Are less common in estuaries than stenohaline species. 
B) Need less oxygen to survive. 
C) Tolerate only a narrow range of salinities. 
D) Can survive changes in salinity. 
E) Only tolerate small temperature changes. 
A) Are less common in estuaries than stenohaline species. 
B) Need less oxygen to survive. 
C) Tolerate only a narrow range of salinities. 
D) Can survive changes in salinity. 
E) Only tolerate small temperature changes.

Question 5

The infauna of mud flats feeds mostly on:

Accepted Answer

A) Epifauna. 
B) Sulfur bacteria. 
C) Filter feeders. 
D) Plankton. 
E) Detritus. 
A) Epifauna. 
B) Sulfur bacteria. 
C) Filter feeders. 
D) Plankton. 
E) Detritus.

Question 6

Succulents are plants that:

Accepted Answer

A) Excrete salts by way of salt glands. 
B) Lose water and salts. 
C) Accumulate water in their tissues. 
D) Take in salts to compensate for the loss of water. 
E) Do not have any roots to minimize water loss. 
A) Excrete salts by way of salt glands. 
B) Lose water and salts. 
C) Accumulate water in their tissues. 
D) Take in salts to compensate for the loss of water. 
E) Do not have any roots to minimize water loss.

Question 7

In an estuary,salinity of the water increases as:

Accepted Answer

A) One moves inland. 
B) Depth decreases. 
C) Evaporation decreases. 
D) Freshwater flow from a river increases. 
E) Depth increases. 
A) One moves inland. 
B) Depth decreases. 
C) Evaporation decreases. 
D) Freshwater flow from a river increases. 
E) Depth increases.

Question 8

Osmoconformers survive changes in salinity by:

Accepted Answer

A) Maintaining the salinity of their body fluids constantly. 
B) Moving up and down the water column in order to spend most of the day in the salt wedge. 
C) Pumping water in as salinity decreases. 
D) Allowing the salinity of their body fluids to vary with that of the surrounding water. 
E) Increasing the amounts of salts in their body fluids no matter what the salinity of the surrounding water is. 
A) Maintaining the salinity of their body fluids constantly. 
B) Moving up and down the water column in order to spend most of the day in the salt wedge. 
C) Pumping water in as salinity decreases. 
D) Allowing the salinity of their body fluids to vary with that of the surrounding water. 
E) Increasing the amounts of salts in their body fluids no matter what the salinity of the surrounding water is.

Question 9

The loss of estuaries and mangrove forests is particularly serious since these ecosystems:

Accepted Answer

A) Provide nesting or resting areas to many seabirds. 
B) Are among the most productive of all marine ecosystems. 
C) Provide habitats to many species. 
D) Directly or indirectly provide food to many species. 
E) All of the choices are true. 
A) Provide nesting or resting areas to many seabirds. 
B) Are among the most productive of all marine ecosystems. 
C) Provide habitats to many species. 
D) Directly or indirectly provide food to many species. 
E) All of the choices are true.

Question 10

The most extensive mangrove forests can be found in:

Accepted Answer

A) Caribbean. 
B) Mediterranean. 
C) Atlantic. 
D) Indo-West Pacific. 
E) Eastern Pacific. 
A) Caribbean. 
B) Mediterranean. 
C) Atlantic. 
D) Indo-West Pacific. 
E) Eastern Pacific.

Question 11

In many tropical areas extensive areas of mangrove forests have been cleared or destroyed in order to raise:

Accepted Answer

A) Mussels. 
B) Oysters. 
C) Salmon. 
D) Tuna. 
E) Shrimp. 
A) Mussels. 
B) Oysters. 
C) Salmon. 
D) Tuna. 
E) Shrimp.

Question 12

A sub-environment native to the estuaries of the Atlantic coast of North America.

Accepted Answer

A) Kelp beds. 
B) Mussel aggreations. 
C) Oyster reefs. 
D) Coral heads. 
E) Tectonic rifts. 
A) Kelp beds. 
B) Mussel aggreations. 
C) Oyster reefs. 
D) Coral heads. 
E) Tectonic rifts.

Question 13

The greatest importance of estuaries to the entire world oceanic ecosystem is as:

Accepted Answer

A) Reservoirs for nutrients. 
B) Breeding grounds for many marine species. 
C) Sources of freshwater for dilution of salinity. 
D) Buffers against storm surge for man-made structures. 
E) Discharge areas for human waste products. 
A) Reservoirs for nutrients. 
B) Breeding grounds for many marine species. 
C) Sources of freshwater for dilution of salinity. 
D) Buffers against storm surge for man-made structures. 
E) Discharge areas for human waste products.

Question 14

Pneumatophores are used for:

Accepted Answer

A) Excretion of excess salts. 
B) Horizontal growth. 
C) Aeration of plant tissues. 
D) Reproduction. 
E) Downward growth. 
A) Excretion of excess salts. 
B) Horizontal growth. 
C) Aeration of plant tissues. 
D) Reproduction. 
E) Downward growth.

Question 15

Well-formed estuaries are least likely to be formed by:

Accepted Answer

A) Sea level rise. 
B) Retreating glaciers. 
C) Active continental margins. 
D) Passive continental margins. 
E) Accumulation of sediments. 
A) Sea level rise. 
B) Retreating glaciers. 
C) Active continental margins. 
D) Passive continental margins. 
E) Accumulation of sediments.

Question 16

Blood rich in hemoglobin is an adaptation to:

Accepted Answer

A) Fluctuating salinities. 
B) Wide variations in temperature. 
C) Soft sediments. 
D) Feeding in detritus. 
E) Low oxygen concentrations. 
A) Fluctuating salinities. 
B) Wide variations in temperature. 
C) Soft sediments. 
D) Feeding in detritus. 
E) Low oxygen concentrations.

Question 17

Outwelling in estuaries is most important since it:

Accepted Answer

A) Maintains high primary production. 
B) Provides living space to many species. 
C) Releases much oxygen. 
D) Provides food and nutrients to other communities. 
E) Allows plants to survive despite wide fluctuations in salinity. 
A) Maintains high primary production. 
B) Provides living space to many species. 
C) Releases much oxygen. 
D) Provides food and nutrients to other communities. 
E) Allows plants to survive despite wide fluctuations in salinity.

Question 18

The world-wide distribution of mangrove forests is mostly determined by:

Accepted Answer

A) Salinity. 
B) Type of sediment. 
C) Temperature. 
D) Wave action. 
E) Height of tide. 
A) Salinity. 
B) Type of sediment. 
C) Temperature. 
D) Wave action. 
E) Height of tide.

Question 19

Coastal plain estuaries were formed when:

Accepted Answer

A) Sand bars formed along the coast as the result of an accumulation of sediment. 
B) The ocean invaded lowlands and river mouths. 
C) Retreating glaciers cut a valley along the coast. 
D) Sea level fell during glaciation. 
E) Land subsided along the coast. 
A) Sand bars formed along the coast as the result of an accumulation of sediment. 
B) The ocean invaded lowlands and river mouths. 
C) Retreating glaciers cut a valley along the coast. 
D) Sea level fell during glaciation. 
E) Land subsided along the coast.

Question 20

Which of these resources is most likely to be in short supply in the open water of an estuary?

Accepted Answer

A) Nutrients 
B) Substrate 
C) Oxygen 
D) Space 
E) Prey 
A) Nutrients 
B) Substrate 
C) Oxygen 
D) Space 
E) Prey

Good examples of bar-built estuaries are found here:

The food web in salt-marsh communities is characterized by high primary production.Most of this production is made available to other communities in the form of:

Mangroves belong to one of the following groups:

Euryhaline species:

The infauna of mud flats feeds mostly on:

Succulents are plants that:

In an estuary,salinity of the water increases as:

Osmoconformers survive changes in salinity by:

The loss of estuaries and mangrove forests is particularly serious since these ecosystems:

The most extensive mangrove forests can be found in:

In many tropical areas extensive areas of mangrove forests have been cleared or destroyed in order to raise:

A sub-environment native to the estuaries of the Atlantic coast of North America.

The greatest importance of estuaries to the entire world oceanic ecosystem is as:

Pneumatophores are used for:

Well-formed estuaries are least likely to be formed by:

Blood rich in hemoglobin is an adaptation to:

Outwelling in estuaries is most important since it:

The world-wide distribution of mangrove forests is mostly determined by:

Coastal plain estuaries were formed when:

Which of these resources is most likely to be in short supply in the open water of an estuary?

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

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

The Ocean Depths

Resources From the Sea

The Impact of Humans on the Marine Environment

The Oceans and Human Affairs

Filters

Exam 12: Estuaries: Where Rivers Meet the Sea

Good examples of bar-built estuaries are found here:

The food web in salt-marsh communities is characterized by high primary production.Most of this production is made available to other communities in the form of:

Mangroves belong to one of the following groups:

Euryhaline species:

The infauna of mud flats feeds mostly on:

Succulents are plants that:

In an estuary,salinity of the water increases as:

Osmoconformers survive changes in salinity by:

The loss of estuaries and mangrove forests is particularly serious since these ecosystems:

The most extensive mangrove forests can be found in:

In many tropical areas extensive areas of mangrove forests have been cleared or destroyed in order to raise:

A sub-environment native to the estuaries of the Atlantic coast of North America.

The greatest importance of estuaries to the entire world oceanic ecosystem is as:

Pneumatophores are used for:

Well-formed estuaries are least likely to be formed by:

Blood rich in hemoglobin is an adaptation to:

Outwelling in estuaries is most important since it:

The world-wide distribution of mangrove forests is mostly determined by:

Coastal plain estuaries were formed when:

Which of these resources is most likely to be in short supply in the open water of an estuary?

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

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

The Ocean Depths

Resources From the Sea

The Impact of Humans on the Marine Environment

The Oceans and Human Affairs

Filters