Question 1

The total number of living species is probably

Accepted Answer

A)   about 450,000.
B)   between 500,000 and 1 million.
C)   between 3 million and 50 million.
D)   between 75 and 95 million.
E)   at least 300 million.F) C) and E)
G) B) and E)

Question 2

The temperature boundary in freshwater lakes is the

Accepted Answer

A)   thermocline.
B)   epilimnion.
C)   benthos.
D)   hypolimnion.E) All of the above
F) None of the above

Question 3

The giant panda is considered to be a _________________ species.

Accepted Answer

A)   keystone
B)   umbrella
C)   flagship
D)   indicator
E)   principalF) A) and C)
G) C) and D)

Question 4

Species diversity is most concentrated in

Accepted Answer

A)   North America and Europe.
B)   South America, Africa, and Southeast Asia.
C)   South Africa, Australia, and Europe.
D)   Oceania, East Asia, and Antarctica.
E)   North America, South America, and AfricaF) C) and D)
G) A) and C)

Question 5

Use the following graph to answer the question.

-You have just been beamed into a biome that has relatively stable temperatures and abundant rainfall. Along with your laser gun, your compass, and rain poncho, you have a graph of precipitation and temperature similar to the one above. Which letter marks the area you are in?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) A) and B)
G) C) and D)

Question 6

Humid tropical forests have extraordinary biological diversity

Accepted Answer

A)   because of the very fertile tropical soils.
B)   because rainfall dissolves soil nutrients and makes them available to plants.
C)   because water is not a limiting factor.
D)   despite a complete absence of nutrients in the environment.
E)   despite the poor, weathered soils.F) All of the above
G) B) and D)

Question 7

We are usually referring to species diversity when we talk about biodiversity. However, genetic diversity is also important to ecological systems because diverse genes

Accepted Answer

A)   increase the efficiency and productivity of a system because all niches are filled.
B)   allow an individual organism to adapt to its changing environment.
C)   are necessary for a population to evolve in a changing environment.
D)   lead to diverse ecological processes in a biological community.
E)   are important for a balanced ecosystem.F) B) and D)
G) All of the above

Question 8

What biome is characterized by moderate temperatures and abundant precipitation?

Accepted Answer

A)   chaparral
B)   tropical rainforest
C)   temperate rainforest
D)   taiga
E)   No biome has moderate temperatures and abundant precipitation.F) A) and E)
G) All of the above C

Question 9

Approximately how many species have been identified on Earth?

Accepted Answer

A)   about 500,000
B)   a little less than 1 million
C)   about 1.7 million
D)   a little more than 10 million
E)   about 30 millionF) B) and E)
G) A) and C)

Question 10

Which of the following statements about trade in endangered species is false?

Accepted Answer

A)   The principal importers of endangered species are developed countries.
B)   Overharvesting affects animals more than plants.
C)   People who say they are animal lovers are the main contributors to the trade.
D)   The principal exporters of endangered species are developing countries.
E)   Endangered species are listed globally by the IUCN.F) A) and B)
G) B) and C)

Question 11

The base of the marine food web is

Accepted Answer

A)   phytoplankton.
B)   sharks.
C)   sea stars.
D)   coral reef organisms.E) B) and D)
F) All of the above

Question 12

Tuna and great white sharks would be found within the

Accepted Answer

A)   benthic zone.
B)   littoral zone.
C)   pelagic zone.
D)   hadal zone.E) A) and D)
F) B) and D)

Question 13

Use the following graph to answer the question.

-Desert biomes would fall in the area marked by the letter

Accepted Answer

A)   A.
B)   B.
C)   C.
D)   D.
E)   E.F) None of the above
G) A) and C)

Question 14

The main reason for the current high rate of animal extinctions is

Accepted Answer

A)   uncontrolled sport hunting in the developed world.
B)   commercial harvesting of wildlife in Africa.
C)   drought conditions caused by the greenhouse effect.
D)   habitat destruction worldwide.
E)   None of these by themselves cause high rates of animal extinctions, but together they combine to cause high rates.F) B) and E)
G) B) and D)

Question 15

Use the following graph to answer the question.

-Temperate forest biomes would fall in the area marked by the letter

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) A) and C)
G) A) and E) B

Question 16

In terms of species diversity and complexity, a coral reef would be similar to which terrestrial biome?

Accepted Answer

A)   Savannah
B)   Arctic tundra
C)   Tropical rainforest
D)   ChaparralE) B) and D)
F) All of the above

Question 17

Habitat fragmentation usually leads to a(n)

Accepted Answer

A)   decrease in biodiversity.
B)   reduction in the number of introduced species.
C)   increase in biodiversity due to the isolated populations.
D)   increase in the number of introduced species.
E)   more stable environment.F) A) and E)
G) B) and C)

Question 18

Which of the following is not a benefit of high biodiversity?

Accepted Answer

A)   aesthetic and cultural value
B)   potential medicinal value
C)   potential sources of food
D)   ecological value
E)   production of carbon dioxideF) C) and D)
G) C) and E)

Question 19

Zebra mussels are a mussel species from Japan that was introduced without negative consequences into the United States to improve water quality.

Accepted Answer

A) True 
 B)False

Question 20

In contrast with the ______________, the soil of the ______________ is more nutrient-rich and this type of biome has fewer insects, parasites, and fungal diseases. Therefore, in many places, these areas are highly endangered.

Accepted Answer

A)   temperate grasslands; tropical seasonal forest
B)   tropical rainforest; tropical seasonal forest
C)   tundra; boreal forests
D)   tropical seasonal forest; tropical rainforest
E)   boreal forests; tundraF) A) and E)
G) B) and E) B

Exam 5: Biomes and Biodiversity

The total number of living species is probably

Correct Answer
verified

The temperature boundary in freshwater lakes is the

Correct Answer
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The giant panda is considered to be a _________________ species.

Correct Answer
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Species diversity is most concentrated in

Correct Answer
verified

Correct Answer
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Humid tropical forests have extraordinary biological diversity

Correct Answer
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We are usually referring to species diversity when we talk about biodiversity. However, genetic diversity is also important to ecological systems because diverse genes

Correct Answer
verified

What biome is characterized by moderate temperatures and abundant precipitation?

Correct Answer
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C

Approximately how many species have been identified on Earth?

Correct Answer
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Which of the following statements about trade in endangered species is false?

Correct Answer
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The base of the marine food web is

Correct Answer
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Tuna and great white sharks would be found within the

Correct Answer
verified

Use the following graph to answer the question. -Desert biomes would fall in the area marked by the letter

Correct Answer
verified

The main reason for the current high rate of animal extinctions is

Correct Answer
verified

Use the following graph to answer the question. -Temperate forest biomes would fall in the area marked by the letter

Correct Answer
verified
B

In terms of species diversity and complexity, a coral reef would be similar to which terrestrial biome?

Correct Answer
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Habitat fragmentation usually leads to a(n)

Correct Answer
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Which of the following is not a benefit of high biodiversity?

Correct Answer
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Zebra mussels are a mussel species from Japan that was introduced without negative consequences into the United States to improve water quality.

Correct Answer
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In contrast with the , the soil of the is more nutrient-rich and this type of biome has fewer insects, parasites, and fungal diseases. Therefore, in many places, these areas are highly endangered.

Correct Answer
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B

Exam 5: Biomes and Biodiversity

The total number of living species is probably

Correct AnswerverifiedShow Answer

The temperature boundary in freshwater lakes is the

Correct AnswerverifiedShow Answer

The giant panda is considered to be a _________________ species.

Correct AnswerverifiedShow Answer

Species diversity is most concentrated in

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Humid tropical forests have extraordinary biological diversity

Correct AnswerverifiedShow Answer

We are usually referring to species diversity when we talk about biodiversity. However, genetic diversity is also important to ecological systems because diverse genes

Correct AnswerverifiedShow Answer

What biome is characterized by moderate temperatures and abundant precipitation?

Correct AnswerverifiedC

Approximately how many species have been identified on Earth?

Correct AnswerverifiedShow Answer

Which of the following statements about trade in endangered species is false?

Correct AnswerverifiedShow Answer

The base of the marine food web is

Correct AnswerverifiedShow Answer

Tuna and great white sharks would be found within the

Correct AnswerverifiedShow Answer

Use the following graph to answer the question. -Desert biomes would fall in the area marked by the letter

Correct AnswerverifiedShow Answer

The main reason for the current high rate of animal extinctions is

Correct AnswerverifiedShow Answer

Use the following graph to answer the question. -Temperate forest biomes would fall in the area marked by the letter

Correct AnswerverifiedB

In terms of species diversity and complexity, a coral reef would be similar to which terrestrial biome?

Correct AnswerverifiedShow Answer

Habitat fragmentation usually leads to a(n)

Correct AnswerverifiedShow Answer

Which of the following is not a benefit of high biodiversity?

Correct AnswerverifiedShow Answer

Zebra mussels are a mussel species from Japan that was introduced without negative consequences into the United States to improve water quality.

Correct AnswerverifiedShow Answer

In contrast with the ______________, the soil of the ______________ is more nutrient-rich and this type of biome has fewer insects, parasites, and fungal diseases. Therefore, in many places, these areas are highly endangered.

Correct AnswerverifiedB

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C

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B

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In contrast with the , the soil of the is more nutrient-rich and this type of biome has fewer insects, parasites, and fungal diseases. Therefore, in many places, these areas are highly endangered.

Correct Answer
verified
B