Question 1

Mud flats are typically low in organic matter.

Accepted Answer

A) True 
 B)False

Question 2

What properties of estuaries make them highly productive areas?

Accepted Answer

Estuaries are very productive because th...

Question 3

All of the following tend to hold nutrients in estuaries for use by other organisms except:

Accepted Answer

A)   adsorption onto silt particles.
B)   reduced numbers of filter feeders.
C)   the formation of pseudofeces.
D)   overturn.E) A) and D)
F) A) and C)

Question 4

Match the area with the type of estuary.
-Well-mixed estuary

Accepted Answer

A)  Puget Sound
B)  Delaware Bay
C)  Sacramento River mouth in San Francisco BayD) All of the above
E) A) and B) B

Question 5

Estuaries are important nurseries because of the relatively low numbers of predators in these areas.

Accepted Answer

A) True 
 B)False

Question 6

All are true of oyster reefs except

Accepted Answer

A)   they are oriented perpendicular to currents.
B)   they are concentrated in lower salinity areas.
C)   they are important habitats for other organisms.
D)   they are adversely affected by rapid changes in salinity.
E)   they are increasing in the Chesapeake Bay.F) D) and E)
G) B) and C)

Question 7

An example of a species that uses the estuary as a nursery ground is the:

Accepted Answer

A)   Atlantic eel.
B)   seal.
C)   shad.
D)   lobster.
E)   tuna.F) A) and B)
G) B) and E) C

Question 8

Estuaries in which river flow is strong and prevents the flow of seawater upstream are called:

Accepted Answer

A)   fjords.
B)   salt-wedge estuaries.
C)   well-mixed estuaries.
D)   tectonic estuaries.
E)   drowned river valleys.F) None of the above
G) A) and C)

Question 9

An example of an osmoregulator at low salinities and an osmoconformer at higher salinities is a(n) :

Accepted Answer

A)   blue crab.
B)   salmon.
C)   oyster.
D)   sea squirt.
E)   tuna.F) B) and D)
G) B) and C)

Question 10

Where rivers slow and drop their sediment load they form deltas termed:

Accepted Answer

A)   dendritic.
B)   coastal plain.
C)   tidal flats.
D)   sand bar.
E)   tombolos.F) All of the above
G) C) and E)

Question 11

Define the following terms:

Accepted Answer

An estuary is a semi-enclosed body of wa...

Question 12

The dominant plant species closest to the water line of salt marsh communities is:

Accepted Answer

A)   cordgrass.
B)   pickleweed.
C)   spike grass.
D)   salt wort.
E)   mangroves.F) All of the above
G) C) and E) A

Question 13

Many of the burrowing animals of the mud flat must actively

Accepted Answer

A)   keep digging to exchange gasses.
B)   circulate water through their burrows.
C)   live near natural breaks in the sediment for gas exchange.
D)   maintain an anaerobic environment.E) C) and D)
F) B) and D)

Question 14

Oyster reefs are usually oriented at right angles to the currents in estuaries. How do you think this could be an advantage to the oysters living in this community?

Accepted Answer

The perpendicular arrangement of oyster ...

Question 15

Match the species with its most closely associated salinity concentration type.
-Both osmoconformer and osmoregulator

Accepted Answer

A)  Nereis polychaetes
B)  tunicates
C)  hermit crabD) A) and B)
E) A) and C)

Question 16

Match the primary producer with its most closely associated herbivore.
-Thalassia

Accepted Answer

A)  soft-shell clam
B)  waterfowl
C)  green turtlesD) All of the above
E) A) and B)

Question 17

The major source of nitrogenous nutrients in estuaries is incoming seawater.

Accepted Answer

A) True 
 B)False

Question 18

All of the following are adaptations to remain stationary in the ever-shifting soft bottom of estuaries except:

Accepted Answer

A)   extensive roots and rhizomes.
B)   holdfasts.
C)   sessile lifestyle.
D)   operculum.
E)   byssal threads.F) None of the above
G) A) and E)

Question 19

Most of the animals of mud flats are:

Accepted Answer

A)   planktonic.
B)   epifaunal.
C)   oysters.
D)   infaunal.
E)   nektonic.F) B) and C)
G) C) and D)

Question 20

Match the genus with its most closely associated common name.
-Oyster drill

Accepted Answer

A)  Mya
B)  Urosalpinx
C)  UlvaD) B) and C)
E) A) and B)

Exam 14: Estuaries

Mud flats are typically low in organic matter.

Correct AnswerverifiedShow Answer

What properties of estuaries make them highly productive areas?

Correct AnswerverifiedEstuaries are very productive because th...View AnswerShow Answer

All of the following tend to hold nutrients in estuaries for use by other organisms except:

Correct AnswerverifiedShow Answer

Match the area with the type of estuary. -Well-mixed estuary

Correct AnswerverifiedB

Estuaries are important nurseries because of the relatively low numbers of predators in these areas.

Correct AnswerverifiedShow Answer

All are true of oyster reefs except

Correct AnswerverifiedShow Answer

An example of a species that uses the estuary as a nursery ground is the:

Correct AnswerverifiedC

Estuaries in which river flow is strong and prevents the flow of seawater upstream are called:

Correct AnswerverifiedShow Answer

An example of an osmoregulator at low salinities and an osmoconformer at higher salinities is a(n) :

Correct AnswerverifiedShow Answer

Where rivers slow and drop their sediment load they form deltas termed:

Correct AnswerverifiedShow Answer

Define the following terms:

Correct AnswerverifiedAn estuary is a semi-enclosed body of wa...View AnswerShow Answer

The dominant plant species closest to the water line of salt marsh communities is:

Correct AnswerverifiedA

Many of the burrowing animals of the mud flat must actively

Correct AnswerverifiedShow Answer

Oyster reefs are usually oriented at right angles to the currents in estuaries. How do you think this could be an advantage to the oysters living in this community?

Correct AnswerverifiedThe perpendicular arrangement of oyster ...View AnswerShow Answer

Match the species with its most closely associated salinity concentration type. -Both osmoconformer and osmoregulator

Correct AnswerverifiedShow Answer

Match the primary producer with its most closely associated herbivore. -Thalassia

Correct AnswerverifiedShow Answer

The major source of nitrogenous nutrients in estuaries is incoming seawater.

Correct AnswerverifiedShow Answer

All of the following are adaptations to remain stationary in the ever-shifting soft bottom of estuaries except:

Correct AnswerverifiedShow Answer

Most of the animals of mud flats are:

Correct AnswerverifiedShow Answer

Match the genus with its most closely associated common name. -Oyster drill

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Estuaries are very productive because th...
View Answer

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
An estuary is a semi-enclosed body of wa...
View Answer

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified
The perpendicular arrangement of oyster ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified