Question 1

Which of the following is an example of an ecosystem?

Accepted Answer

A)   zebras and the lions that prey on them
B)   a coral reef together with all the fishes and invertebrates living in and around it
C)   flowering plants and all the insects and birds that pollinate them
D)   male prairie chickens competing for access to mates
E)   rabbits eating carrotsF) B) and E)
G) A) and B)

Question 2

To increase her tomato yield, an organic gardener plants legumes alongside her tomato bushes rather than using fertilizers. Why did she plant legumes?

Accepted Answer

A)   Legumes have root nodules with nitrogen fixing bacteria.
B)   Legumes convert ammonium to nitrates.
C)   Root nodules on legumes have denitrifying bacteria.
D)   Legumes are an immediate source of phosphorus and nitrogen.
E)   Root nodules on legumes produce nitrifying bacteria.F) B) and E)
G) A) and B)

Question 3

The most inclusive level of biological organization is __________.

Accepted Answer

A)   ecosystems
B)   biomes
C)   the biosphere
D)   communities
E)   ecotypesF) D) and E)
G) A) and B)

Question 4

Which of the following is an autotroph?

Accepted Answer

A)   rose bush
B)   lion
C)   decomposer
D)   omnivore
E)   hyenaF) D) and E)
G) A) and B)

Question 5

Among American warblers, several different species often live in the same spruce trees and eat caterpillars. However, each species reproduces at a slightly different time of year and each species also forage at different areas within the tree canopy. These differences in foraging behaviors and reproduction is an example of

Accepted Answer

A)   competitive exclusion.
B)   character displacement.
C)   resource partitioning.
D)   mutualism.
E)   competitive inclusion.F) A) and B)
G) A) and C)

Question 6

A keystone species is

Accepted Answer

A)   the largest species in a community.
B)   the most numerous species in a community.
C)   the least numerous species in a community.
D)   a species on which many other species depend.
E)   the species that occupies most of the niches within a particular environment.F) B) and E)
G) C) and D)

Question 7

What is the main reason that the tundra does not have large plants?

Accepted Answer

A)   The seeds of large plants were never dispersed into these regions.
B)   The amount of sunlight is not great enough for large plants to survive.
C)   The amount of rainfall is not enough for large plants to survive.
D)   The other species of plants have out competed them for resources.
E)   The permafrost persists, even during the summer.F) B) and E)
G) A) and C)

Question 8

An ecosystem

Accepted Answer

A)   includes only the plants within a particular area.
B)   includes all the living organisms within a specific area, but not the abiotic factors.
C)   includes both living and abiotic factors within a particular region.
D)   always includes equal numbers of plant and animal species.
E)   only refers to biotic factors in a region.F) B) and D)
G) A) and B)

Question 9

Which of the following is an example of the competitive exclusion principle?

Accepted Answer

A)   two different species occupying the same ecological niche
B)   two species competing for food and territory
C)   competition of mates between two different species
D)   two species sharing the same habitat
E)   one species outcompeting another species in a particular nicheF) A) and C)
G) A) and B)

Question 10

When too many nutrients are added to of a body of water, this is known as __________.

Accepted Answer

A)   A biogeochemical cycle
B)   reservoirs
C)   eutrophication
D)   global warming
E)   nitrogen fixingF) A) and D)
G) A) and B) C

Question 11

Which of the following would be considered a parasitic relationship?

Accepted Answer

A)   Some species of crabs decorate their shells with sea anemones and other corals. These "decorations" help camouflage the crab and the movement of the crab from one area to the next exposes the corals and anemones to different sources of food.
B)   Some spiders do not build webs, but live in the web of another species. When a prey item is caught in the web, the non-web building spider will sneak in and steal the prey.
C)   A praying mantis hunting and eating a fly.
D)   The longest tapeworm removed from a human was approximately 11 meters long. Tapeworms do not have a digestive system, but obtains all of their nutrients from the host which can cause problems for the host especially if (s) he is undernourished.
E)   Pseudoscorpions are small, harmless arachnids. To move from one place to another, they will sometimes latch onto the legs of flies and thus be carried long distances that they would not readily be able to traverse.F) B) and D)
G) B) and E) D

Question 12

A chemoautotroph obtains its energy from all of the following EXCEPT __________.

Accepted Answer

A)   ammonia
B)   oxygen
C)   sulfides
D)   nitritesE) C) and D)
F) A) and B) B

Question 13

Martin is studying blue gill fish which are insectivores. How would you classify this fish?

Accepted Answer

A)   autotrophic consumer
B)   autotrophic producer
C)   heterotrophic decomposer
D)   detritivore
E)   heterotrophic consumerF) A) and B)
G) A) and C)

Question 14

Which of the following is an example of predation?

Accepted Answer

A)   daddy-long-legs, a type of arachnid that eat dead and decaying matter
B)   marine filter-feeders that have long tentacles to filter food particles from the water
C)   a starfish which is able to evert its stomach to break open and eat clams
D)   a giraffe pulling leaves off tall trees with its long tongue
E)   a tick that attaches to a deer and sucks its bloodF) None of the above
G) A) and B)

Question 15

All of the following are true about both primary and secondary succession EXCEPT

Accepted Answer

A)   both lead to a stable climax community.
B)   both include a progression of changes in the community over time.
C)   both occur in regions where soil is already present.
D)   for both communities, fungi and vascular seedless plants are typically the first species to colonize the area.
E)   both are colonized first by opportunistic species.F) A) and B)
G) C) and D)

Question 16

In aquatic ecosystems primary productivity is most dependent on

Accepted Answer

A)   organic nutrients.
B)   species richness and diversity.
C)   the type of soil.
D)   the rate of photosynthesis.
E)   inorganic nutrients.F) D) and E)
G) B) and E)

Question 17

The aquatic ecosystem with the least amount of inorganic matter is ___________.

Accepted Answer

A)   estuaries
B)   coral reefs
C)   open oceans
D)   lakes
E)   swampsF) A) and E)
G) B) and C)

Question 18

Figure: 
-Based on the figure shown here, which organism is NOT a primary consumer?

Accepted Answer

A)   rabbit
B)   deer
C)   mice
D)   chipmunk
E)   fisherF) All of the above
G) B) and D)

Question 19

In an aquatic ecosystem, the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish, the crayfish are eaten by fish, and the fish are eaten by ducks. Based on this, which of the following is incorrectly matched?

Accepted Answer

A)   aquatic plant - producer
B)   crayfish - secondary consumer
C)   duck - 4th trophic level
D)   fish - tertiary consumer
E)   small invertebrates - 2nd trophic levelF) A) and D)
G) B) and C)

Question 20

On average, 90% of biomass is transferred from one trophic level to the next.

Accepted Answer

A) True 
 B)False

Exam 31: Communities and Ecosystems

Which of the following is an example of an ecosystem?

Correct Answer
verified

To increase her tomato yield, an organic gardener plants legumes alongside her tomato bushes rather than using fertilizers. Why did she plant legumes?

Correct Answer
verified

The most inclusive level of biological organization is __________.

Correct Answer
verified

Which of the following is an autotroph?

Correct Answer
verified

Correct Answer
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A keystone species is

Correct Answer
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What is the main reason that the tundra does not have large plants?

Correct Answer
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An ecosystem

Correct Answer
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Which of the following is an example of the competitive exclusion principle?

Correct Answer
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When too many nutrients are added to of a body of water, this is known as __________.

Correct Answer
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C

Which of the following would be considered a parasitic relationship?

Correct Answer
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D

A chemoautotroph obtains its energy from all of the following EXCEPT __________.

Correct Answer
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B

Martin is studying blue gill fish which are insectivores. How would you classify this fish?

Correct Answer
verified

Which of the following is an example of predation?

Correct Answer
verified

All of the following are true about both primary and secondary succession EXCEPT

Correct Answer
verified

In aquatic ecosystems primary productivity is most dependent on

Correct Answer
verified

The aquatic ecosystem with the least amount of inorganic matter is ___________.

Correct Answer
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Figure: -Based on the figure shown here, which organism is NOT a primary consumer?

Correct Answer
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In an aquatic ecosystem, the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish, the crayfish are eaten by fish, and the fish are eaten by ducks. Based on this, which of the following is incorrectly matched?

Correct Answer
verified

On average, 90% of biomass is transferred from one trophic level to the next.

Correct Answer
verified

Exam 31: Communities and Ecosystems

Which of the following is an example of an ecosystem?

Correct AnswerverifiedShow Answer

To increase her tomato yield, an organic gardener plants legumes alongside her tomato bushes rather than using fertilizers. Why did she plant legumes?

Correct AnswerverifiedShow Answer

The most inclusive level of biological organization is __________.

Correct AnswerverifiedShow Answer

Which of the following is an autotroph?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A keystone species is

Correct AnswerverifiedShow Answer

What is the main reason that the tundra does not have large plants?

Correct AnswerverifiedShow Answer

An ecosystem

Correct AnswerverifiedShow Answer

Which of the following is an example of the competitive exclusion principle?

Correct AnswerverifiedShow Answer

When too many nutrients are added to of a body of water, this is known as __________.

Correct AnswerverifiedC

Which of the following would be considered a parasitic relationship?

Correct AnswerverifiedD

A chemoautotroph obtains its energy from all of the following EXCEPT __________.

Correct AnswerverifiedB

Martin is studying blue gill fish which are insectivores. How would you classify this fish?

Correct AnswerverifiedShow Answer

Which of the following is an example of predation?

Correct AnswerverifiedShow Answer

All of the following are true about both primary and secondary succession EXCEPT

Correct AnswerverifiedShow Answer

In aquatic ecosystems primary productivity is most dependent on

Correct AnswerverifiedShow Answer

The aquatic ecosystem with the least amount of inorganic matter is ___________.

Correct AnswerverifiedShow Answer

Figure: -Based on the figure shown here, which organism is NOT a primary consumer?

Correct AnswerverifiedShow Answer

In an aquatic ecosystem, the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish, the crayfish are eaten by fish, and the fish are eaten by ducks. Based on this, which of the following is incorrectly matched?

Correct AnswerverifiedShow Answer

On average, 90% of biomass is transferred from one trophic level to the next.

Correct AnswerverifiedShow Answer

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C

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D

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B

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