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BIO145 Marine Biology Lesson 11 Quiz




Question;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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