Solved by a verified expert:1 of 25
Deposit feeders would most
likely be found on which substrate?
None of the above
2 of 25
Fjords are formed as a
result of the
subsidence of land.
lowering of sea level.
formation of sand bars and barrier islands.
coast being cut by a river.
raising of sea level.
3 of 25
An animal that feeds by
catching plankton as it swims by is called a
4 of 25
The most common type of
substrate in estuaries is
None of the above .
5 of 25
changes in salinity by
maintaining the salinity of their body fluids
moving up and down the water column in order
to spend most of the day in the salt wedge.
pumping water in as salinity decreases.
allowing the salinity of their body fluids to
vary with that of the surrounding water.
increasing the amounts of salts in their body
fluids no matter the salinity of the surrounding water.
6 of 25
Most of the primary
production on mud flats is due to
7 of 25
Interstitial organisms are
also classified as
8 of 25
Blood rich in hemoglobin is
an adaptation to
wide variations in temperature.
feeding in detritus.
low oxygen concentrations.
9 of 25
Zonation in an estuary is
made evident by
a large number of worms in the mud.
presence of different species along different
horizontal levels in relation to tides.
tide pools along the mud flats.
absence of life in black sediments.
high concentration of plants in salt marshes.
10 of 25
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
plant tissue eaten by grazers.
plankton eaten by filter feeders.
plants eaten by herbivores.
plants eaten by zooplankton.
11 of 25
The worldwide distribution
of mangrove forests is mostly determined by
type of sediment.
height of tide.
12 of 25
Taking a fiddler crab to a
new location and observing that its rhythms remain the same proves that fiddler
crabs have a _____________ ___________.
navigation system that relies on Earth’s
reproductive cycle that corresponds to phases
of the moon
13 of 25
The loss of estuaries and
mangrove forests is particularly serious since these ecosystems
provide nesting or resting areas to many
are among the most productive of all marine
provide habitats to many species.
directly or indirectly provide food to many
All of the above.
14 of 25
Pneumatophores are used for
excretion of excess salts.
aeration of plant tissues.
15 of 25
The part of the continental
shelf that is never exposed at low tide is called the
16 of 25
The distribution of the
infauna of soft-bottom subtidal communities is often closely related to
particle size of sediment.
distribution of seaweeds.
17 of 25
Which of the following
factors is most likely to have an effect on the global distribution of
organisms on the continental shelf?
Stratification of water
18 of 25
As turbulence decreases
the amount of oxygen in the sediment
the amount of detritus in the sediment
the size of sediment particles increases.
the relative number of suspension feeders
the relative number of seaweed species
19 of 25
Which of the following will
be relatively uncommon components of rocky subtidal communities?
20 of 25
By definition, kelp forests
kelp fronds float on the surface.
the kelp is large enough to rise above the
the kelp lives in warm water.
kelp fronds have leaves.
the kelp holdfast is large enough to be called
a true root system.
21 of 25
Kelps are characteristic of
Arctic and Antarctic coasts.
hard bottoms in the tropics.
soft bottoms but only in the tropics.
22 of 25
The distribution of kelp
species along a particular coast is known to be affected by all of the
following factors except
type of grazers.
23 of 25
Sea otters are known to
affect the development of giant kelp forests by
helping in the dispersion of spores.
removing competing seaweeds.
feeding on carnivorous fishes.
feeding on grazing sea urchins.
releasing nutrients present in feces and
24 of 25
Primary production on
soft-bottomed subtidal communities is highest in
25 of 25
Which of the following
strategies is not used by seaweeds resulting in less grazing?