Question 1

Given that most nutrients can dissolve into water which of the following statements is false?

Accepted Answer

A)  N2 dissolves into water droplets and is carried to the earth to be used by producers
B)  Water can leach nutrients out of the soil and carry it away from an ecosystem
C)  Carbon dioxide dissolves into water and is then available to aquatic producers
D)  Water can carry nutrients into the soil where they are available to plants through their roots
E)  Runoff water can pollute a pond,stream,or lake if excess nutrients are carried in the waterF) B) and D)
G) C) and D)

Question 2

Which would be the climax community in a biome that receives a large amount of rainfall?

Accepted Answer

A)  Large plants such as shrubs and trees
B)  Small native plants of the area such as grasses and herbs
C)  Plants with high tolerance to full sun,limited water,limited nutrients
D)  The pioneer community
E)  Lichens,mosses,and fernsF) A) and E)
G) D) and E)

Question 3

Which is not a mutualistic relationship?

Accepted Answer

A)  Termites with protozoa and bacteria that digest cellulose
B)  Pseudomyrmex ants living on the bullhorn acacia tree
C)  Mycorrhizal fungal filaments in the roots of plants
D)  Snowshoe hare and the Canadian lynx
E)  Flowering plants and their insect pollinatorsF) B) and E)
G) A) and E)

Question 4

Which of the following is correct in a predator-prey cycle?

Accepted Answer

A)  Predators will always cause the prey to go extinct
B)  A decline in the number of prey causes a decline in the number of predators
C)  A decline in the number of predators causes a decline in the number of prey
D)  An increase in the number of predators triggers an increase in the number of prey
E)  Generally prey are unaffected by predatorsF) A) and D)
G) C) and E)

Question 5

Which of these is NOT a requirement or influence on chemical cycling of inorganic nutrients in a natural ecosystem?

Accepted Answer

A)  The input of geothermal energy
B)  An exchange pool from which producers draw their nutrients
C)  The biotic community and its food chains
D)  Human activities
E)  A reservoir for the elements in the EarthF) All of the above
G) A) and E)

Question 6

Which term describes the concept that no two species can have the same specific role in the community at the same time?

Accepted Answer

A)  Mimicry
B)  Niche
C)  Habitat
D)  Competitive exclusion
E)  SymbiosisF) B) and E)
G) All of the above

Question 7

A frog is found along the edge of a pond feeding upon mayflies.This would be the frog's:

Accepted Answer

A)  Ecological niche
B)  Ecosystem
C)  Abiotic component
D)  Ecology
E)  Biotic componentF) C) and E)
G) All of the above

Question 8

Nitrification refers to the production of:

Accepted Answer

A)  Nitrogen gas
B)  Nitrate
C)  Ammonia
D)  Nitrite
E)  AmmoniumF) A) and B)
G) A) and C)

Question 9

Which organisms make their own food?

Accepted Answer

A)  Producers
B)  Heterotrophs
C)  Omnivores
D)  Consumers
E)  DecomposersF) C) and D)
G) B) and D)

Question 10

Which organisms feed on the remains of dead animals (that they did not kill) ?

Accepted Answer

A)  Decomposers
B)  Autotrophs
C)  Secondary producers
D)  Scavengers
E)  Primary producersF) C) and E)
G) B) and E)

Question 11

Which of the following is not true about the phosphorus cycle?

Accepted Answer

A)  Geologic upheavals move phosphorus from ocean to land
B)  Phosphorus is often a limiting nutrient in many ecosystems
C)  The slow weathering of rocks returns phosphorus to the soil
D)  Phosphorus in the ecosystem is a major contributor to global warming
E)  Phosphorus never enters the atmosphereF) C) and D)
G) A) and B)

Question 12

-This figure shows energy flow and chemical cycling in an ecosystem.What does "b" represent?

Accepted Answer

A)  Solar energy
B)  Producers
C)  Inorganic nutrients
D)  Decomposers
E)  ConsumersF) A) and B)
G) B) and E)

Question 13

Fungi and bacteria are detritus-feeders,also known as:

Accepted Answer

A)  Autotrophs
B)  Carnivores
C)  Decomposers
D)  Omnivores
E)  HerbivoresF) D) and E)
G) A) and B)

Question 14

The three locations where a nutrient may be found in an ecosystem are

Accepted Answer

A)  An exchange pool where the nutrient is readily available to producers;reservoirs that serve as long term storage and living organisms that act as short term storage
B)  An exchange pool that serves as long term storage;reservoirs where the nutrient is readily available to producers and living organisms that act as short term storage
C)  An exchange pool that serves as short term storage;reservoirs where the nutrient is readily available to producers and living organisms that act as long term storage
D)  An exchange pool that acts as short term storage;reservoirs that act as long term storage and living organisms where the nutrient is readily available to producers
E)  An exchange pool that serves as long term storage;reservoirs that act as short term storage and living organisms where the nutrient is readily available to producersF) A) and E)
G) All of the above

Question 15

Which of the following is not a method in which phosphorus gets added to the soil?

Accepted Answer

A)  Geological uplift
B)  Weathering of rocks
C)  Fertilizer
D)  Sewage treatment plants
E)  MiningF) A) and B)
G) B) and C)

Question 16

A small marine amphipod has recently been discovered that carries another bad tasting organism on its back against its normal behavior.The "backpack" organism tastes bad.If a fish ingests the pair,it immediately spits them back out.If the amphipod is alone,however,the amphipod is readily eaten and swallowed.There is no apparent benefit in this relationship for the "backpack" organism which appears to be neither helped nor harmed.This is therefore a case of

Accepted Answer

A)  commensalism.
B)  competitive exclusion.
C)  predation.
D)  parasitism.
E)  mutualism.F) A) and D)
G) B) and C)

Question 17

In a pine forest few other species of plants grow under the pines because the needles of pine trees are acidic and make the soil more acidic.This is an example of

Accepted Answer

A)  The tolerance model
B)  The facilitation model
C)  The climax model
D)  An opportunistic model
E)  The inhibition modelF) A) and D)
G) D) and E)

Question 18

A form of symbiosis in which one participant benefits and the other apparently is not benefited nor harmed is:

Accepted Answer

A)  Predation
B)  Commensalism
C)  Mutualism
D)  Parasitism
E)  CompetitionF) D) and E)
G) None of the above

Question 19

Mimics that share the same protective defense are called:

Accepted Answer

A)  Camouflage mimics
B)  Mullerian mimics
C)  Warning mimics
D)  Batesian mimics
E)  Cryptic mimicsF) A) and D)
G) B) and C)

Question 20

Which of the following is not true about a food web?

Accepted Answer

A)  It contains several trophic levels
B)  It contains many food chains
C)  It interacts with the physical environment
D)  It uses only the carbon cycle
E)  It is usually stableF) B) and E)
G) A) and D)

Exam 39: Community and Ecosystem Ecology

The three locations where a nutrient may be found in an ecosystem are

Correct Answer
verified

Mimics that share the same protective defense are called:

Correct Answer
verified

Which term describes the concept that no two species can have the same specific role in the community at the same time?

Correct Answer
verified

In a pine forest few other species of plants grow under the pines because the needles of pine trees are acidic and make the soil more acidic.This is an example of

Correct Answer
verified

Nitrification refers to the production of:

Correct Answer
verified

Which of the following is not a method in which phosphorus gets added to the soil?

Correct Answer
verified

Fungi and bacteria are detritus-feeders,also known as:

Correct Answer
verified

Correct Answer
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Which is not a mutualistic relationship?

Correct Answer
verified

A frog is found along the edge of a pond feeding upon mayflies.This would be the frog's:

Correct Answer
verified

-This figure shows energy flow and chemical cycling in an ecosystem.What does "b" represent?

Correct Answer
verified

Which would be the climax community in a biome that receives a large amount of rainfall?

Correct Answer
verified

A form of symbiosis in which one participant benefits and the other apparently is not benefited nor harmed is:

Correct Answer
verified

Given that most nutrients can dissolve into water which of the following statements is false?

Correct Answer
verified

Which of the following is not true about a food web?

Correct Answer
verified

Which organisms feed on the remains of dead animals (that they did not kill) ?

Correct Answer
verified

Which of the following is correct in a predator-prey cycle?

Correct Answer
verified

Which of the following is not true about the phosphorus cycle?

Correct Answer
verified

Which of these is NOT a requirement or influence on chemical cycling of inorganic nutrients in a natural ecosystem?

Correct Answer
verified

Which organisms make their own food?

Correct Answer
verified

Exam 39: Community and Ecosystem Ecology

The three locations where a nutrient may be found in an ecosystem are

Correct AnswerverifiedShow Answer

Mimics that share the same protective defense are called:

Correct AnswerverifiedShow Answer

Which term describes the concept that no two species can have the same specific role in the community at the same time?

Correct AnswerverifiedShow Answer

In a pine forest few other species of plants grow under the pines because the needles of pine trees are acidic and make the soil more acidic.This is an example of

Correct AnswerverifiedShow Answer

Nitrification refers to the production of:

Correct AnswerverifiedShow Answer

Which of the following is not a method in which phosphorus gets added to the soil?

Correct AnswerverifiedShow Answer

Fungi and bacteria are detritus-feeders,also known as:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which is not a mutualistic relationship?

Correct AnswerverifiedShow Answer

A frog is found along the edge of a pond feeding upon mayflies.This would be the frog's:

Correct AnswerverifiedShow Answer

-This figure shows energy flow and chemical cycling in an ecosystem.What does "b" represent?

Correct AnswerverifiedShow Answer

Which would be the climax community in a biome that receives a large amount of rainfall?

Correct AnswerverifiedShow Answer

A form of symbiosis in which one participant benefits and the other apparently is not benefited nor harmed is:

Correct AnswerverifiedShow Answer

Given that most nutrients can dissolve into water which of the following statements is false?

Correct AnswerverifiedShow Answer

Which of the following is not true about a food web?

Correct AnswerverifiedShow Answer

Which organisms feed on the remains of dead animals (that they did not kill) ?

Correct AnswerverifiedShow Answer

Which of the following is correct in a predator-prey cycle?

Correct AnswerverifiedShow Answer

Which of the following is not true about the phosphorus cycle?

Correct AnswerverifiedShow Answer

Which of these is NOT a requirement or influence on chemical cycling of inorganic nutrients in a natural ecosystem?

Correct AnswerverifiedShow Answer

Which organisms make their own food?

Correct AnswerverifiedShow Answer

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