Question 1

What occurs when two species with very similar niches live in an overlapping range?

Accepted Answer

A)   speciation
B)   hypervolume
C)   competitive exclusion
D)   total extinction of one species
E)   a switch in habitat for one of the organismsF) A) and B)
G) A) and C)

Question 2

Compared with the numbers of grasshoppers or deer, there are not a lot of mountain lions. The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Accepted Answer

A)   such animals do not tolerate other members like them.
B)   through natural selection, most fierce animals have been killed off by others.
C)   food chains are only 10 to 20% efficient at each step, and top carnivores are therefore limited by the availability of food in their range.
D)   only a few such animals are permitted by succession in a biome, and there are only a few biomes.E) A) and B)
F) None of the above

Question 3

Which type of succession would occur after a volcanic eruption?

Accepted Answer

A)   primary
B)   secondary
C)   tertiary
D)   There won't be any succession after a volcanic eruptionE) B) and D)
F) B) and C)

Question 4

The relationship between plants and their pollinators is a good example of parasitism.

Accepted Answer

A) True 
 B)False

Question 5

What is the correct sequence of organisms if a community is going through secondary succession?
A. grasses establish themselves in the community
B. shrubs establish themselves in the community
C. soil formation occurs
D. trees establish themselves in the community

Accepted Answer

A)   a - b - d
B)   c - a - b - d
C)   d - c - a - b
D)   c - a - d
E)   a - c - bF) B) and D)
G) C) and E)

Question 6

What does the model of island biogeography predict about: 
A. the relationship between the distance of an island from the mainland and immigration of species? Draw a graph depicting the relationship.
B. the relationship between the size of an island and the rate of extinction? Draw a graph depicting the relationship.
C. what type of island will have a higher equilibrium species richness than the other types of islands? Combine (and draw) the two previous graphs and indicate the equilibrium species richness of each island.

Accepted Answer

A. The model of island geography predict...

Question 7

All of the conditions under which an organism could conceivably survive and reproduce constitute its

Accepted Answer

A)   habitat.
B)   realized niche.
C)   fundamental niche.
D)   resource partition.E) A) and C)
F) A) and D)

Question 8

In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they occupy

Accepted Answer

A)   the same habitat but different niches.
B)   the same habitat and the same niche.
C)   the same niche but different habitats.
D)   different habitats and different niches.E) A) and C)
F) B) and C)

Question 9

All food chains begin with a photosynthetic producer.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following statement(s)  about the hydrologic cycle is (are)  true?

Accepted Answer

A)   Because this is a true cycle, it is impossible to run out of fresh water for human use.
B)   All water molecules that evaporate from the ocean precipitate on land and move by gravity through groundwater to the ocean again.
C)   Some water evaporates from land and from plants.
D)   Once water sinks into the ground, it is safe from human exploitation or pollution until it has rejoined the ocean.
E)   All of the choices are true.F) All of the above
G) B) and D)

Question 11

The actual conditions under which an organism exists in nature constitute its

Accepted Answer

A)   habitat.
B)   realized niche.
C)   fundamental niche.
D)   resource partition.E) A) and B)
F) C) and D)

Question 12

Excluding humans, which group of organisms is most likely to change the abiotic factors within an ecosystem?

Accepted Answer

A)   producers
B)   herbivores
C)   detritivores
D)   None of these can change the abiotic factors within an ecosystem.
E)   All of these can change the abiotic factors within an ecosystem.F) B) and C)
G) A) and E)

Question 13

The only heterotrophs required in an ecosystem are

Accepted Answer

A)   omnivores.
B)   herbivores.
C)   decomposers.
D)   autotrophs.
E)   carnivores.F) All of the above
G) C) and D)

Exam 45: Community and Ecosystem Ecology

What occurs when two species with very similar niches live in an overlapping range?

Correct Answer
verified

Which of the following statement(s) about the hydrologic cycle is (are) true?

Correct Answer
verified

Compared with the numbers of grasshoppers or deer, there are not a lot of mountain lions. The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Correct Answer
verified

The actual conditions under which an organism exists in nature constitute its

Correct Answer
verified

Excluding humans, which group of organisms is most likely to change the abiotic factors within an ecosystem?

Correct Answer
verified

The only heterotrophs required in an ecosystem are

Correct Answer
verified

What is the correct sequence of organisms if a community is going through secondary succession? A. grasses establish themselves in the community B. shrubs establish themselves in the community C. soil formation occurs D. trees establish themselves in the community

Correct Answer
verified

All of the conditions under which an organism could conceivably survive and reproduce constitute its

Correct Answer
verified

All food chains begin with a photosynthetic producer.

Correct Answer
verified

The relationship between plants and their pollinators is a good example of parasitism.

Correct Answer
verified

Correct Answer
verified
A. The model of island geography predict...
View Answer

In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they occupy

Correct Answer
verified

Which type of succession would occur after a volcanic eruption?

Correct Answer
verified

Exam 45: Community and Ecosystem Ecology

What occurs when two species with very similar niches live in an overlapping range?

Correct AnswerverifiedShow Answer

Which of the following statement(s) about the hydrologic cycle is (are) true?

Correct AnswerverifiedShow Answer

Compared with the numbers of grasshoppers or deer, there are not a lot of mountain lions. The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Correct AnswerverifiedShow Answer

The actual conditions under which an organism exists in nature constitute its

Correct AnswerverifiedShow Answer

Excluding humans, which group of organisms is most likely to change the abiotic factors within an ecosystem?

Correct AnswerverifiedShow Answer

The only heterotrophs required in an ecosystem are

Correct AnswerverifiedShow Answer

What is the correct sequence of organisms if a community is going through secondary succession? A. grasses establish themselves in the community B. shrubs establish themselves in the community C. soil formation occurs D. trees establish themselves in the community

Correct AnswerverifiedShow Answer

All of the conditions under which an organism could conceivably survive and reproduce constitute its

Correct AnswerverifiedShow Answer

All food chains begin with a photosynthetic producer.

Correct AnswerverifiedShow Answer

The relationship between plants and their pollinators is a good example of parasitism.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA. The model of island geography predict...View AnswerShow Answer

In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they occupy

Correct AnswerverifiedShow Answer

Which type of succession would occur after a volcanic eruption?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A. The model of island geography predict...
View Answer

Correct Answer
verified

Correct Answer
verified