Question 1

In a food web diagram,groups of species that derive food energy from a similar source are called ________ levels.

Accepted Answer

The answer of In a food web diagram,groups of species...

Question 2

In aquatic habitats,the upper zone of water where the availability of light supports photosynthesis by phytoplankton is called the ________ zone.

Accepted Answer

The answer of In aquatic habitats,the upper zone of water...

Question 3

Among the array of species that make up a community,not all are equally abundant.

Accepted Answer

A) True 
 B)False

Question 4

When a single or a few species are most prevalent in a community,the species are called ________.

Accepted Answer

The answer of When a single or a few species...

Question 5

The garter snake in this diagram is an example of a(n)

Accepted Answer

A)  top predator.
B)  basal species.
C)  herbivore.
D)  intermediate species.E) A) and B)
F) B) and C)

Question 6

Which statement best describes a keystone species?

Accepted Answer

A)  a rare or uncommon species that has a strong effect on its community
B)  an abundant species that may or may not affect other species
C)  a species that takes up a great deal of space in a community
D)  a common species that has a strong effect on its communityE) A) and B)
F) B) and D)

Question 7

Dominant species tend to be more abundant than other species because they

Accepted Answer

A)  prey upon or parasitize other species.
B)  outcompete other species.
C)  are preyed upon less than other species.
D)  reproduce more rapidly than other species.E) A) and D)
F) B) and C)

Question 8

In a sandy beach community,ghost crabs and beach flies occur within

Accepted Answer

A)  the supratidal zone.
B)  the intertidal zone.
C)  the subtidal zone.
D)  any tidal zone.E) B) and C)
F) A) and C)

Question 9

Some aquatic communities are defined by physical features of the abiotic environment rather than by the dominant organisms.

Accepted Answer

A) True 
 B)False

Question 10

Within a community,a group of species that carries out similar functions or exploits the same resource is called a(n)________.

Accepted Answer

The answer of Within a community,a group of species that...

Question 11

An organismic concept of communities was developed by

Accepted Answer

A)  Gleason.
B)  Simpson.
C)  Shannon.
D)  Clements.E) A) and C)
F) B) and C)

Question 12

Which is the most dominant species?

Accepted Answer

A)  largest in number
B)  highest in relative abundance
C)  most relative biomass
D)  All of the above can indicate dominance.E) B) and C)
F) All of the above D

Question 13

A species that has massive effects on an ecosystem but in proportion to its abundance is a

Accepted Answer

A)  keystone species.
B)  basal species.
C)  dominant species.
D)  top predator.E) All of the above
F) A) and D)

Question 14

The goal of restoration ecology is to

Accepted Answer

A)  create the most functional ecosystem.
B)  improve productivity in an ecosystem.
C)  return the community to its pre-disturbance condition.
D)  restore the use of ecosystem services.E) A) and D)
F) A) and B)

Question 15

Within a food web,herbivores are considered to be

Accepted Answer

A)  basal species.
B)  intermediate species.
C)  top predators.
D)  represented at any level.E) A) and B)
F) All of the above

Question 16

In a forest community,the upper layer is called the ________.

Accepted Answer

The answer of In a forest community,the upper layer is...

Question 17

Species composition does not usually differ much within a local area,such as between a hilltop and a stream bottomland.

Accepted Answer

A) True 
 B)False

Question 18

In a well-stratified lake,the thermocline refers to a steep and rapid decline in temperature relative to the waters above and below.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following has the highest species richness? A community with

Accepted Answer

A)  34 species of high evenness.
B)  36 species with very low evenness.
C)  35 species of high evenness.
D)  33 species of low evenness.E) A) and B)
F) A) and C) B

Question 20

Which description is true for most communities?

Accepted Answer

A)  All species have approximately equal abundances.
B)  All species are rare.
C)  All species are common.
D)  A few species are common and the remainder are rare.E) All of the above
F) A) and B) D

Exam 16: Community Structure

In a food web diagram,groups of species that derive food energy from a similar source are called ________ levels.

Correct AnswerverifiedShow Answer

In aquatic habitats,the upper zone of water where the availability of light supports photosynthesis by phytoplankton is called the ________ zone.

Correct AnswerverifiedShow Answer

Among the array of species that make up a community,not all are equally abundant.

Correct AnswerverifiedShow Answer

When a single or a few species are most prevalent in a community,the species are called ________.

Correct AnswerverifiedShow Answer

The garter snake in this diagram is an example of a(n)

Correct AnswerverifiedShow Answer

Which statement best describes a keystone species?

Correct AnswerverifiedShow Answer

Dominant species tend to be more abundant than other species because they

Correct AnswerverifiedShow Answer

In a sandy beach community,ghost crabs and beach flies occur within

Correct AnswerverifiedShow Answer

Some aquatic communities are defined by physical features of the abiotic environment rather than by the dominant organisms.

Correct AnswerverifiedShow Answer

Within a community,a group of species that carries out similar functions or exploits the same resource is called a(n)________.

Correct AnswerverifiedShow Answer

An organismic concept of communities was developed by

Correct AnswerverifiedShow Answer

Which is the most dominant species?

Correct AnswerverifiedD

A species that has massive effects on an ecosystem but in proportion to its abundance is a

Correct AnswerverifiedShow Answer

The goal of restoration ecology is to

Correct AnswerverifiedShow Answer

Within a food web,herbivores are considered to be

Correct AnswerverifiedShow Answer

In a forest community,the upper layer is called the ________.

Correct AnswerverifiedShow Answer

Species composition does not usually differ much within a local area,such as between a hilltop and a stream bottomland.

Correct AnswerverifiedShow Answer

In a well-stratified lake,the thermocline refers to a steep and rapid decline in temperature relative to the waters above and below.

Correct AnswerverifiedShow Answer

Which of the following has the highest species richness? A community with

Correct AnswerverifiedB

Which description is true for most communities?

Correct AnswerverifiedD

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D

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B

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D