Question 1

The main source of food in muddy-bottom intertidal communities:

Accepted Answer

A) Seaweeds. 
B) Detritus. 
C) Plankton. 
D) Large prey. 
E) Epifauna. 
A) Seaweeds. 
B) Detritus. 
C) Plankton. 
D) Large prey. 
E) Epifauna. B

Question 2

Byssal threads are used by mussels to cope with:

Accepted Answer

A) Dessication. 
B) Wave shock. 
C) Restricted feeding. 
D) Salinity changes. 
E) Temperature changes. 
A) Dessication. 
B) Wave shock. 
C) Restricted feeding. 
D) Salinity changes. 
E) Temperature changes. B

Question 3

A rocky shoreline would be most likely to be found in:

Accepted Answer

A) California. 
B) Massachusetts. 
C) Hawaii. 
D) All answers are correct. 
E) California and Massachusetts only. 
A) California. 
B) Massachusetts. 
C) Hawaii. 
D) All answers are correct. 
E) California and Massachusetts only. D

Question 4

One of these organisms is typically a very rare component of soft-bottom intertidal communities:

Accepted Answer

A) Burrowing organisms. 
B) Detritus feeders. 
C) Seaweeds. 
D) Infauna. 
E) Deposit feeders. 
A) Burrowing organisms. 
B) Detritus feeders. 
C) Seaweeds. 
D) Infauna. 
E) Deposit feeders.

Question 5

The upper limit of rocky intertidal communities is typically determined by:

Accepted Answer

A) Mostly biological factors. 
B) Mostly physical factors. 
C) Both biological and physical factors. 
D) Neither physical or biological factors. 
A) Mostly biological factors. 
B) Mostly physical factors. 
C) Both biological and physical factors. 
D) Neither physical or biological factors.

Question 6

In terms of oxygen,the interstitial water in muddy bottoms:

Accepted Answer

A) Has plenty of it since temperature is much higher than in the water column. 
B) Accumulates it as a result of photosynthesis by inhabitants of the sediment. 
C) Recirculates very frequently so it is high. 
D) Is deficient in it. 
E) Is deficient in it but only during the day. 
A) Has plenty of it since temperature is much higher than in the water column. 
B) Accumulates it as a result of photosynthesis by inhabitants of the sediment. 
C) Recirculates very frequently so it is high. 
D) Is deficient in it. 
E) Is deficient in it but only during the day.

Question 7

If a rocky shore highly exposed to wave action is compared to a similar rocky shore that is a lot less exposed to wave action,we should expect that barnacles living on the more exposed shore show a:

Accepted Answer

A) Wider vertical distribution. 
B) Narrower tolerance to salinity. 
C) Narrower tolerance to temperature. 
D) Narrower vertical distribution. 
E) Higher resistance to predators. 
A) Wider vertical distribution. 
B) Narrower tolerance to salinity. 
C) Narrower tolerance to temperature. 
D) Narrower vertical distribution. 
E) Higher resistance to predators.

Question 8

The particular characteristic most widely used in classifying intertidal communities:

Accepted Answer

A) Type of tides. 
B) Relative exposure to air. 
C) Type of substrate. 
D) Type of seaweeds. 
E) Relative immersion by water. 
A) Type of tides. 
B) Relative exposure to air. 
C) Type of substrate. 
D) Type of seaweeds. 
E) Relative immersion by water.

Question 9

In soft-bottomed intertidal communities,locations with strong waves and currents are most likely to have which type of bottom?

Accepted Answer

A) Gravel 
B) Sand 
C) Silt 
D) Clay 
E) Mud 
A) Gravel 
B) Sand 
C) Silt 
D) Clay 
E) Mud

Question 10

Vertical zonation on rocky shores is mostly the result of differences in tolerance to:

Accepted Answer

A) Wave action 
B) Exposure. 
C) Predation. 
D) Light. 
E) Salinity. 
A) Wave action 
B) Exposure. 
C) Predation. 
D) Light. 
E) Salinity.

Question 11

Meiofauna live:

Accepted Answer

A) On rocky shores 
B) On sandy bottoms 
C) Between grains of sediment 
D) In burrows 
E) In the water column 
A) On rocky shores 
B) On sandy bottoms 
C) Between grains of sediment 
D) In burrows 
E) In the water column

Question 12

Which of the following strategies is not used to avoid dessication in the intertidal?

Accepted Answer

A) Closing shells 
B) Crowding by organisms in areas that are always moist 
C) Burrowing into substrate 
D) Mucus 
E) Moving out of tide pools 
A) Closing shells 
B) Crowding by organisms in areas that are always moist 
C) Burrowing into substrate 
D) Mucus 
E) Moving out of tide pools

Question 13

One organism typical of the upper intertidal on rocky shores:

Accepted Answer

A) Bottom fish. 
B) Barnacles. 
C) Sponges. 
D) Sea anemones. 
E) Periwinkles. 
A) Bottom fish. 
B) Barnacles. 
C) Sponges. 
D) Sea anemones. 
E) Periwinkles.

Question 14

The number of species in a given community can be increased by:

Accepted Answer

A) Disturbance 
B) Predation 
C) Competitive exclusion 
D) All answers are correct 
E) Disturbance and Predation only 
A) Disturbance 
B) Predation 
C) Competitive exclusion 
D) All answers are correct 
E) Disturbance and Predation only

Question 15

Many types of rockweeds/macroalgaes have pneumatocycts that assist them is gaining:

Accepted Answer

A) Dissolved ions. 
B) Nutrients. 
C) Water content. 
D) Less grazing predation. 
E) Light availability. 
A) Dissolved ions. 
B) Nutrients. 
C) Water content. 
D) Less grazing predation. 
E) Light availability.

Question 16

Regarding the origin of rocky coasts,it is known that this type of shore is present along:

Accepted Answer

A) Geologically young coasts. 
B) Coasts with high accumulation of sediments. 
C) Coasts along the mouth of large rivers. 
D) Geologically old coasts being covered by sediments. 
E) Coasts being affected by ice sheets. 
A) Geologically young coasts. 
B) Coasts with high accumulation of sediments. 
C) Coasts along the mouth of large rivers. 
D) Geologically old coasts being covered by sediments. 
E) Coasts being affected by ice sheets.

Question 17

Intertidal organisms from exposed areas sometimes have thicker shells than their counterparts from less exposed areas.This is thought to be an adaptation to:

Accepted Answer

A) Dessication. 
B) Restricted feeding. 
C) Wave shock. 
D) Salinity changes. 
E) Temperature changes. 
A) Dessication. 
B) Restricted feeding. 
C) Wave shock. 
D) Salinity changes. 
E) Temperature changes.

Question 18

Which of the following would not be considered epifauna?

Accepted Answer

A) Organisms living on the surface on another organism 
B) Organisms living on the surface of sand 
C) Organisms living in sand 
D) Organisms living on mud 
E) Organisms living on rocky shore 
A) Organisms living on the surface on another organism 
B) Organisms living on the surface of sand 
C) Organisms living in sand 
D) Organisms living on mud 
E) Organisms living on rocky shore

Question 19

Which of these organisms inhabits the area at or above the high tide line on a sandy beach?

Accepted Answer

A) Sea cucumber 
B) Blue crab 
C) Ghost crab 
D) Moon snail 
A) Sea cucumber 
B) Blue crab 
C) Ghost crab 
D) Moon snail

Question 20

Predation by sea stars on rocky shores ultimately results in:

Accepted Answer

A) Fewer species. 
B) Less wave action. 
C) Decrease in the number of seaweeds. 
D) Increase in the number of mussels. 
E) More species. 
A) Fewer species. 
B) Less wave action. 
C) Decrease in the number of seaweeds. 
D) Increase in the number of mussels. 
E) More species.

The main source of food in muddy-bottom intertidal communities:

Byssal threads are used by mussels to cope with:

A rocky shoreline would be most likely to be found in:

One of these organisms is typically a very rare component of soft-bottom intertidal communities:

The upper limit of rocky intertidal communities is typically determined by:

In terms of oxygen,the interstitial water in muddy bottoms:

If a rocky shore highly exposed to wave action is compared to a similar rocky shore that is a lot less exposed to wave action,we should expect that barnacles living on the more exposed shore show a:

The particular characteristic most widely used in classifying intertidal communities:

In soft-bottomed intertidal communities,locations with strong waves and currents are most likely to have which type of bottom?

Vertical zonation on rocky shores is mostly the result of differences in tolerance to:

Meiofauna live:

Which of the following strategies is not used to avoid dessication in the intertidal?

One organism typical of the upper intertidal on rocky shores:

The number of species in a given community can be increased by:

Many types of rockweeds/macroalgaes have pneumatocycts that assist them is gaining:

Regarding the origin of rocky coasts,it is known that this type of shore is present along:

Intertidal organisms from exposed areas sometimes have thicker shells than their counterparts from less exposed areas.This is thought to be an adaptation to:

Which of the following would not be considered epifauna?

Which of these organisms inhabits the area at or above the high tide line on a sandy beach?

Predation by sea stars on rocky shores ultimately results in:

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

Estuaries: Where Rivers Meet the Sea

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

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Exam 11: Between the Tides

The main source of food in muddy-bottom intertidal communities:

Byssal threads are used by mussels to cope with:

A rocky shoreline would be most likely to be found in:

One of these organisms is typically a very rare component of soft-bottom intertidal communities:

The upper limit of rocky intertidal communities is typically determined by:

In terms of oxygen,the interstitial water in muddy bottoms:

If a rocky shore highly exposed to wave action is compared to a similar rocky shore that is a lot less exposed to wave action,we should expect that barnacles living on the more exposed shore show a:

The particular characteristic most widely used in classifying intertidal communities:

In soft-bottomed intertidal communities,locations with strong waves and currents are most likely to have which type of bottom?

Vertical zonation on rocky shores is mostly the result of differences in tolerance to:

Meiofauna live:

Which of the following strategies is not used to avoid dessication in the intertidal?

One organism typical of the upper intertidal on rocky shores:

The number of species in a given community can be increased by:

Many types of rockweeds/macroalgaes have pneumatocycts that assist them is gaining:

Regarding the origin of rocky coasts,it is known that this type of shore is present along:

Intertidal organisms from exposed areas sometimes have thicker shells than their counterparts from less exposed areas.This is thought to be an adaptation to:

Which of the following would not be considered epifauna?

Which of these organisms inhabits the area at or above the high tide line on a sandy beach?

Predation by sea stars on rocky shores ultimately results in:

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

Estuaries: Where Rivers Meet the Sea

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