Solved by a verified expert:1 of 25
Deposit feeders would most
likely be found on which substrate?
Sandy bottoms
Muddy bottoms
Gravel bottoms
Rocky shores
None of the above
Question
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.
Question
3 of 25
An animal that feeds by
catching plankton as it swims by is called a
deposit feeder.
suspension feeder.
opportunistic feeder.
detritivore.
scavenger
Question
4 of 25
The most common type of
substrate in estuaries is
mud.
rock.
coarse sand.
fine sand.
None of the above .
Question
5 of 25
Osmoconformers survive
changes in salinity by
maintaining the salinity of their body fluids
constantly.
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.
Question
6 of 25
Most of the primary
production on mud flats is due to
diatoms.
green algae.
brown algae.
red algae.
sulfur bacteria.
Question
7 of 25
Interstitial organisms are
also classified as
infauna.
endofauna.
epifauna.
meiofauna.
midfauna.
Question
8 of 25
Blood rich in hemoglobin is
an adaptation to
fluctuating salinities.
wide variations in temperature.
soft sediments.
feeding in detritus.
low oxygen concentrations.
Question
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.
Question
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.
detritus.
plants eaten by herbivores.
plants eaten by zooplankton.
Question
11 of 25
The worldwide distribution
of mangrove forests is mostly determined by
salinity.
type of sediment.
temperature.
wave action.
height of tide.
Question
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
magnetic field
tidal cycle
reproductive cycle that corresponds to phases
of the moon
biological clock
time-space orientation
Question
13 of 25
The loss of estuaries and
mangrove forests is particularly serious since these ecosystems
provide nesting or resting areas to many
seabirds.
are among the most productive of all marine
ecosystems.
provide habitats to many species.
directly or indirectly provide food to many
species.
All of the above.
Question
14 of 25
Pneumatophores are used for
excretion of excess salts.
horizontal growth.
aeration of plant tissues.
reproduction.
downward growth.
Question
15 of 25
The part of the continental
shelf that is never exposed at low tide is called the
littoral zone.
subtidal zone.
intertidal zone.
pelagic zone.
abyssal zone.
Question
16 of 25
The distribution of the
infauna of soft-bottom subtidal communities is often closely related to
temperature.
particle size of sediment.
salinity.
distribution of seaweeds.
light.
Question
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
Oxygen
Nutrients
Temperature
Turbulence
Question
18 of 25
As turbulence decreases
the amount of oxygen in the sediment
decreases.
the amount of detritus in the sediment
decreases.
the size of sediment particles increases.
the relative number of suspension feeders
increases.
the relative number of seaweed species
increases.
Question
19 of 25
Which of the following will
be relatively uncommon components of rocky subtidal communities?
Producers
Grazers
Predators
Infauna
Epifauna
Question
20 of 25
By definition, kelp forests
develop when
kelp fronds float on the surface.
the kelp is large enough to rise above the
bottom.
the kelp lives in warm water.
kelp fronds have leaves.
the kelp holdfast is large enough to be called
a true root system.
Question
21 of 25
Kelps are characteristic of
soft bottoms.
Arctic and Antarctic coasts.
hard bottoms in the tropics.
soft bottoms but only in the tropics.
temperate regions.
Question
22 of 25
The distribution of kelp
species along a particular coast is known to be affected by all of the
following factors except
light.
wave action.
carnivorous fishes.
depth.
type of grazers.
Question
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
urine.
Question
24 of 25
Primary production on
soft-bottomed subtidal communities is highest in
salt marshes.
mangrove forests.
seagrass beds.
oyster reefs.
coral reefs.
Question
25 of 25
Which of the following
strategies is not used by seaweeds resulting in less grazing?
Chemical defenses
Leathery consistency
Calcium carbonate
Bad taste
Slow growth
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