Question 1

Which of the following whale species are recovering their population numbers as a result of whale harvesting regulations? I-right whales
II-Pacific gray whales
III-sperm whales
IV-fin whales
V-humpback whales

Accepted Answer

A)  I and II
B)  I, II, and III
C)  II and V
D)  I, II, III, and IVE) A) and D)
F) A) and C)

Question 2

A small island has stable populations of plants and animals, including one species of hawk but no other large predators.A ship docks at the island, and the sailors huntand kill most of the hawks.What would you expect as an immediate consequence?

Accepted Answer

A)  an increase in the plants
B)  an increase in the insects
C)  an increase in the rodents
D)  a decrease in the fishE) B) and C)
F) A) and D)

Question 3

An organism whose decline or removal from a habitat causes many other species numbers to change dramatically is called __________ species.

Accepted Answer

A)  a keystone
B)  a synergistic
C)  a nominal
D)  an introducedE) C) and D)
F) A) and D) A

Question 4

One of the important reasons for maintaining biodiversity is to

Accepted Answer

A)  prevent loss of habitats that can be logged or farmed at some future date.
B)  prevent loss of habitat leading to edge effects.
C)  prevent introduction of invasive species.
D)  maintain the genetic diversity of wild relatives of common crops.E) All of the above
F) A) and B)

Question 5

As many as one-half of Earth's plants

Accepted Answer

A)  may already have gone extinct in the last 100 years.
B)  may be threatened with extinction at present.
C)  may be considered invasive species.
D)  are known to be medicinally useful.E) None of the above
F) B) and D)

Question 6

Sea otters have been used as an example of the "Keystone Species" concept.This means that sea otters

Accepted Answer

A)  are the base of the food chain in their ecosystem.
B)  are the dominant species in their ecosystem.
C)  exert a strong influence on the structure and functioning of their ecosystem.
D)  have been recently introduced and are recruiting other new species to the ecosystem.E) B) and C)
F) None of the above

Question 7

Conservationists have identified 25 areas worldwide as hotspots.This means these areas

Accepted Answer

A)  are currently being preserved.
B)  have serious pollution problems and are being targeted for cleanup.
C)  have high numbers of endemic species, and those numbers are increasing.
D)  have high numbers of endemic species, and those numbers are decreasing.E) None of the above
F) A) and D)

Question 8

Island species are particularly vulnerable to extinction for all of the following reasons except

Accepted Answer

A)  humans have altered habitats.
B)  island species have lost the ability to escape predators.
C)  humans have introduced competitors.
D)  humans have introduced diseases.
E)  fewer endemic species are found on islands.F) B) and C)
G) A) and E)

Question 9

The West African black rhino, one of four subspecies of rhinoceros, was declared extinct in 2006.Their horns were believed by many to hold medicinal value.What is the most likely reason for the extinction of the West African black rhino?

Accepted Answer

A)  habitat loss
B)  overexploitation
C)  introduced species
D)  pollutionE) B) and D)
F) B) and C)

Question 10

A floodplain is an area adjacent a stream or river that experiences flooding during periods of high discharge.These ecosystems can be very rich in both quantity and diversity of organisms and can contain up to 1,000 times more species than a river.Many floodplains have been compromised by the construction of levees, pollution, and the draining of wetlands and marshes.A restoration project that focuses its efforts on the removal of levees and the improvement of water quality, is a plan focused on

Accepted Answer

A)  restoration of species.
B)  restoration of ecosystem functioning.C) A) and B)
D) undefined

Question 11

Natural colonization can happen in all of the following ways except

Accepted Answer

A)  a flock of birds gets blown off course.
B)  a bird eats a fruit on the mainland and defecates the seed on an island.
C)  people plant new species on an island.
D)  lowered sea levels connect two areas previously isolated.E) B) and C)
F) B) and D)

Question 12

The process of examining the genomes of animals and plants for useful genes is

Accepted Answer

A)  gene prospecting.
B)  genetic engineering.
C)  phenotypic labeling.
D)  cloning.E) A) and B)
F) A) and D) A

Question 13

A major problem with hotspots is humans moving in and causing

Accepted Answer

A)  habitat destruction.
B)  increased genetic diversity.
C)  increased immigration among species.
D)  decreased introductions.E) All of the above
F) B) and D)

Question 14

The degree of allelic diversityof a population is independent of its size.

Accepted Answer

A) True 
 B)False

Question 15

Regarding megafaunal extinctions, it is assumed that the driving factor was

Accepted Answer

A)  climate change.
B)  the Ice Age.
C)  Homo sapiens.
D)  a meteorite.E) C) and D)
F) A) and D)

Question 16

Ecologists are concerned about amphibian populations because

Accepted Answer

A)  their loss would be an aesthetic loss to the planet.
B)  of the possibility of numerous medicinal uses.
C)  they are keystone species in many areas-their loss will cause other populations to crash.
D)  amphibians are very sensitive to environmental change-they may be indicating serious problems.E) None of the above
F) A) and D)

Question 17

Areas with high levels of endemism are called species

Accepted Answer

A)  islands.
B)  fragments.
C)  hotspots.
D)  reserves.E) B) and D)
F) All of the above C

Question 18

As we study the past 50,000 years worth of information about species' decline and extinctions around the world

Accepted Answer

A)  we see rapid extinctions, especially of the larger animals, not long after humans arrive in an area.
B)  we can make a rough estimate of a population's risk of a local extinction.
C)  we see a steady-state rate of extinctions on all continents, only islands show a difference due to climate change.
D)  we see huge extinctions, especially of the larger animals, with ice ages and global warming.E) C) and D)
F) B) and C)

Question 19

Scientists speculate that extinctions did not occur in Africa as they did on other continents because animals coevolved with _______ in Africa.

Accepted Answer

A)  plants
B)  diseases
C)  parasites
D)  humansE) B) and D)
F) C) and D)

Question 20

As habitats are fragmented and consequently shrinking in size, a major problem is

Accepted Answer

A)  the edge effect.
B)  lack of corridors.
C)  overexploitation.
D)  introduced species.E) B) and C)
F) A) and D)

Exam 59: Conservation Biology

Which of the following whale species are recovering their population numbers as a result of whale harvesting regulations? I-right whales II-Pacific gray whales III-sperm whales IV-fin whales V-humpback whales

Correct Answer
verified

A small island has stable populations of plants and animals, including one species of hawk but no other large predators.A ship docks at the island, and the sailors huntand kill most of the hawks.What would you expect as an immediate consequence?

Correct Answer
verified

An organism whose decline or removal from a habitat causes many other species numbers to change dramatically is called __________ species.

Correct Answer
verified
A

One of the important reasons for maintaining biodiversity is to

Correct Answer
verified

As many as one-half of Earth's plants

Correct Answer
verified

Sea otters have been used as an example of the "Keystone Species" concept.This means that sea otters

Correct Answer
verified

Conservationists have identified 25 areas worldwide as hotspots.This means these areas

Correct Answer
verified

Island species are particularly vulnerable to extinction for all of the following reasons except

Correct Answer
verified

The West African black rhino, one of four subspecies of rhinoceros, was declared extinct in 2006.Their horns were believed by many to hold medicinal value.What is the most likely reason for the extinction of the West African black rhino?

Correct Answer
verified

Correct Answer
verified

Natural colonization can happen in all of the following ways except

Correct Answer
verified

The process of examining the genomes of animals and plants for useful genes is

Correct Answer
verified
A

A major problem with hotspots is humans moving in and causing

Correct Answer
verified

The degree of allelic diversityof a population is independent of its size.

Correct Answer
verified

Regarding megafaunal extinctions, it is assumed that the driving factor was

Correct Answer
verified

Ecologists are concerned about amphibian populations because

Correct Answer
verified

Areas with high levels of endemism are called species

Correct Answer
verified
C

As we study the past 50,000 years worth of information about species' decline and extinctions around the world

Correct Answer
verified

Scientists speculate that extinctions did not occur in Africa as they did on other continents because animals coevolved with _______ in Africa.

Correct Answer
verified

As habitats are fragmented and consequently shrinking in size, a major problem is

Correct Answer
verified

Exam 59: Conservation Biology

Which of the following whale species are recovering their population numbers as a result of whale harvesting regulations? I-right whales II-Pacific gray whales III-sperm whales IV-fin whales V-humpback whales

Correct AnswerverifiedShow Answer

A small island has stable populations of plants and animals, including one species of hawk but no other large predators.A ship docks at the island, and the sailors huntand kill most of the hawks.What would you expect as an immediate consequence?

Correct AnswerverifiedShow Answer

An organism whose decline or removal from a habitat causes many other species numbers to change dramatically is called __________ species.

Correct AnswerverifiedA

One of the important reasons for maintaining biodiversity is to

Correct AnswerverifiedShow Answer

As many as one-half of Earth's plants

Correct AnswerverifiedShow Answer

Sea otters have been used as an example of the "Keystone Species" concept.This means that sea otters

Correct AnswerverifiedShow Answer

Conservationists have identified 25 areas worldwide as hotspots.This means these areas

Correct AnswerverifiedShow Answer

Island species are particularly vulnerable to extinction for all of the following reasons except

Correct AnswerverifiedShow Answer

The West African black rhino, one of four subspecies of rhinoceros, was declared extinct in 2006.Their horns were believed by many to hold medicinal value.What is the most likely reason for the extinction of the West African black rhino?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Natural colonization can happen in all of the following ways except

Correct AnswerverifiedShow Answer

The process of examining the genomes of animals and plants for useful genes is

Correct AnswerverifiedA

A major problem with hotspots is humans moving in and causing

Correct AnswerverifiedShow Answer

The degree of allelic diversityof a population is independent of its size.

Correct AnswerverifiedShow Answer

Regarding megafaunal extinctions, it is assumed that the driving factor was

Correct AnswerverifiedShow Answer

Ecologists are concerned about amphibian populations because

Correct AnswerverifiedShow Answer

Areas with high levels of endemism are called species

Correct AnswerverifiedC

As we study the past 50,000 years worth of information about species' decline and extinctions around the world

Correct AnswerverifiedShow Answer

Scientists speculate that extinctions did not occur in Africa as they did on other continents because animals coevolved with _______ in Africa.

Correct AnswerverifiedShow Answer

As habitats are fragmented and consequently shrinking in size, a major problem is

Correct AnswerverifiedShow Answer

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A

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A

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C

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