Question 1

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)  rising sea levels.F) All of the above
G) C) and D)

Question 2

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) A) and E)
G) B) and C)

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) A) and D)
F) All of the above

Question 4

What becomes more likely to occur in a small population? Check all that apply.

Accepted Answer

A)  the Allee effect
B)  increased genetic drift
C)  increased genetic diversity
D)  extinction vortex
E)  increased edge effectF) A) and B)
G) C) and D)

Question 5

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)  decreased biomagnification.F) A) and E)
G) A) and D)

Question 6

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 hunt and 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 fish
E)  a decrease in the plantsF) B) and E)
G) None of the above C

Question 7

Why might the different species of whales fail to recover even though hunting has been banned?

Accepted Answer

A)  loss of genetic diversity
B)  loss of habitat
C)  introduction of invasive species
D)  increasing predation
E)  increased disease spread due to edge effectsF) B) and E)
G) All of the above

Question 8

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 9

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) A) and B)
F) C) and D)

Question 10

Human caused introductions can occur by which of the following? Check all that apply.

Accepted Answer

A)  plants and animals accidentally escaping from ships
B)  automobile or truck tires
C)  being in the soil or on a plant sold at a nursery
D)  seeds or organisms attaching to clothing or shoes
E)  international cargo ships releasing ballast water in the ocean before arriving at portF) A) and E)
G) C) and E)

Question 11

Edge effects are the result of which of the following?

Accepted Answer

A)  Populations of flora and fauna have emigrated from the core of their population center to the edge of their habitat.
B)  Metapopulations of some of the larger fauna have become more dominant on the landscape and as a result have increased the edge of their habitat.
C)  Habitat fragmentation or habitat shrinkage has occurred,and thus the edge of the habitat has increased in relative proportion.
D)  Habitat fragmentation or habitat shrinkage has occurred,and thus the edge of the habitat has decreased in relative proportion.
E)  Populations of particular species have decreased and are on the edge of extinction.F) B) and D)
G) B) and C) C

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) C) and D)
F) A) and C)

Question 13

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 IV
E)  I,II,and VF) C) and D)
G) B) and D) C

Question 14

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)  birds pick up seeds on their feet while wading in mud and drop them elsewhere.F) A) and D)
G) A) and C)

Question 15

The extinction vortex

Accepted Answer

A)  is what happens as a population decreases and becomes more vulnerable to extinction from a variety of causes.
B)  begins when one species in an ecosystem goes extinct and other species follow.
C)  is what happens when competing species fight over a single niche,often driving both species to extinction.
D)  is a spiral of events that occur once a species has become overcrowded through excess reproduction.
E)  is a spiral of events that includes introduction of competing species,overexploitation,and disease,in that order.F) A) and B)
G) A) and C)

Question 16

Researchers in England found that,for three out of four habitat types they were studying,the most efficient strategy was to create a system of stepping stones linking existing habitat clusters."Stepping stones" are a type of corridor.

Accepted Answer

A) True 
 B)False

Question 17

Animals that weigh more than 100 pounds are considered as

Accepted Answer

A)  extinct.
B)  endangered species.
C)  safe from extinction.
D)  sensitive species.
E)  megafauna.F) B) and E)
G) C) and D)

Question 18

Without elephants,African grasslands convert to forests or to shrublands.Which of the following phrases are true statements about the elephant? Check all that apply.

Accepted Answer

A)  The elephant is a keystone species.
B)  If elephants went extinct,other species in the area would be unaffected.
C)  Elephants graze on young shrubs and trees.
D)  Elephants are the most abundant species on the grassland.
E)  Grazing antelope depend on the presence of the elephant.F) A) and B)
G) A) and C)

Question 19

Scientists estimate that about ________ of the world's eukaryotic organisms have been discovered and given scientific names.

Accepted Answer

A)  1%
B)  5%
C)  15%
D)  40%
E)  90%F) A) and D)
G) D) and E)

Question 20

Historical extinction rates are best known for

Accepted Answer

A)  reptiles and amphibians.
B)  reptiles and birds.
C)  amphibians and fish.
D)  amphibians and birds.
E)  birds and mammals.F) A) and D)
G) C) and D)

Exam 58: Conservation Biology

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

Correct Answer
verified

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

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

What becomes more likely to occur in a small population? Check all that apply.

Correct Answer
verified

A major problem with hotspots is humans moving in and causing

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 hunt and kill most of the hawks.What would you expect as an immediate consequence?

Correct Answer
verified
C

Why might the different species of whales fail to recover even though hunting has been banned?

Correct Answer
verified

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

Human caused introductions can occur by which of the following? Check all that apply.

Correct Answer
verified

Edge effects are the result of which of the following?

Correct Answer
verified
C

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

Correct Answer
verified

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
C

Natural colonization can happen in all of the following ways except

Correct Answer
verified

The extinction vortex

Correct Answer
verified

Researchers in England found that,for three out of four habitat types they were studying,the most efficient strategy was to create a system of stepping stones linking existing habitat clusters."Stepping stones" are a type of corridor.

Correct Answer
verified

Animals that weigh more than 100 pounds are considered as

Correct Answer
verified

Without elephants,African grasslands convert to forests or to shrublands.Which of the following phrases are true statements about the elephant? Check all that apply.

Correct Answer
verified

Scientists estimate that about ________ of the world's eukaryotic organisms have been discovered and given scientific names.

Correct Answer
verified

Historical extinction rates are best known for

Correct Answer
verified

Exam 58: Conservation Biology

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What becomes more likely to occur in a small population? Check all that apply.

Correct AnswerverifiedShow Answer

A major problem with hotspots is humans moving in and causing

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 hunt and kill most of the hawks.What would you expect as an immediate consequence?

Correct AnswerverifiedC

Why might the different species of whales fail to recover even though hunting has been banned?

Correct AnswerverifiedShow Answer

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

Human caused introductions can occur by which of the following? Check all that apply.

Correct AnswerverifiedShow Answer

Edge effects are the result of which of the following?

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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 AnswerverifiedC

Natural colonization can happen in all of the following ways except

Correct AnswerverifiedShow Answer

The extinction vortex

Correct AnswerverifiedShow Answer

Researchers in England found that,for three out of four habitat types they were studying,the most efficient strategy was to create a system of stepping stones linking existing habitat clusters."Stepping stones" are a type of corridor.

Correct AnswerverifiedShow Answer

Animals that weigh more than 100 pounds are considered as

Correct AnswerverifiedShow Answer

Without elephants,African grasslands convert to forests or to shrublands.Which of the following phrases are true statements about the elephant? Check all that apply.

Correct AnswerverifiedShow Answer

Scientists estimate that about ________ of the world's eukaryotic organisms have been discovered and given scientific names.

Correct AnswerverifiedShow Answer

Historical extinction rates are best known for

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified