Question 1

What was hypothesized about the loss of legs in modern-day snakes?

Accepted Answer

A)  Snakes descended from land-dwelling ancestors.
B)  Snakes descended only from burrowing lizards on land.
C)  Snakes descended only from marine lizards.
D)  Snakes do not have forelimbs or hindlimbs.
E)  Some extant snakes have forelimbs or hindlimbs.

Question 2

Within the country of Indonesia,the island of Sumatra has tigers and rhinos,while to the East,the island of Sulawesi has cockatoos and tree kangaroos.What is the best explanation for this observation?

Accepted Answer

A)  The climates on the two islands are very different,allowing some species to survive,and others not.
B)  Some species can migrate between islands and others cannot.
C)  Animals in Sumatra evolved independently,while those in Sulawesi came from Australia.
D)  Animals in Sumatra came from Asia,while those in Sulawesi came from Australia.
E)  Animals in Sumatra and Sulawesi both came from Asia,but those in Sulawesi migrated farther.

Question 3

Which of the following is least likely to be preserved as a fossil?

Accepted Answer

A)  a bone or shell
B)  a leaf or stem
C)  an organ like an eye or lung
D)  a complete large organism
E)  an organism that died on land

Question 4

What is needed to estimate species relatedness with a molecular clock?

Accepted Answer

A)  DNA accumulates mutations at a regular rate
B)  known mutation rate for a gene
C)  the number of differences in DNA sequences for a gene in two species
D)  the same gene identified in two species
E)  All answers are correct.

Question 5

Which of the following is most likely to be preserved as a fossil?

Accepted Answer

A)  a leaf or stem
B)  a bone or shell
C)  an organ like an eye or lung
D)  a complete large organism
E)  an organism that died on land

Question 6

The half life of 14C is 5,730 years.If you test a fossilized bone and find that it has 1/8th the 14C as a modern bone,you could conclude that it is approximately __ years old.

Accepted Answer

A)  5,730 x 2 = 11,460
B)  5,730 x 1 = 5,730
C)  5,730 x 8 = 42,960
D)  5,730 / 8 = 716
E)  5,730 x 3 = 17,190

Question 7

In the section "Investigating Life: Evolving Backwards," what is the significance of the marine fossil snakes (highlighted in the figure) ?

Accepted Answer

A)  Is an ancestor to modern-day snakes and has same anatomical organization as modern-day snakes
B)  Is an outgroup unrelated to modern-day snakes
C)  Has the same anatomical organization as modern-day snakes
D)  Has a common ancestor to modern-day snakes,but placed in a derived group
E)  Is the ancestor to modern-day snakes,but has different anatomical organization than modern-day snakes

Question 8

The number of differences between cytochrome c of humans and cytochrome c of other organisms is as follows: Rhesus monkey - 1 difference;pigeon - 12 differences;fruit fly - 24 differences.The order in which these species are most similar to humans is

Accepted Answer

A)  Rhesus monkey,pigeon,fruit fly.
B)  pigeon,Rhesus monkey,fruit fly.
C)  pigeon,fruit fly,Rhesus monkey.
D)  Rhesus monkey,fruit fly,pigeon.
E)  fruit fly,pigeon,Rhesus monkey.

Question 9

Dinosaurs lived essentially during the Paleozoic era.

Accepted Answer

A) True 
 B)False

Question 10

Fossils may be

Accepted Answer

A)  from impressions left after an organism decays.
B)  formed as organic matter is replaced by minerals,turning to stone.
C)  formed when plant resin or tar preserves the specimen.
D)  casts from footprints that have filled with mud and then turned to stone.
E)  All answers are correct.

Question 11

When ocean levels dropped about 70 million years ago,marsupial mammals moved into North America and displaced many of the placental mammal species.

Accepted Answer

A) True 
 B)False

Question 12

Placental mammals give birth to more fully developed offspring than marsupial mammals and therefore have a greater chance of survival.This helps to explain why placental mammals from North America displaced many native South American marsupial mammals when a land bridge formed between the two continents.

Accepted Answer

A) True 
 B)False

Question 13

Earth once consisted of a single large landmass and one ocean.The landmass is named

Accepted Answer

A)  PanthalassA.
B)  Pangaea.
C)  Laurasia.
D)  Gondwana.
E)  Ultima Continenta.

Question 14

If similarities between two structures in different organisms reflect common ancestry,these structures are

Accepted Answer

A)  vestigial.
B)  analogous.
C)  homologous.
D)  homeotic.
E)  heterologous.

Question 15

In a fruit fly embryo,the end that becomes the head contains high amounts of the protein bicoid.What may happen if you injected high levels of bicoid in the other end of the embryo?

Accepted Answer

A)  It would fail to develop a head.
B)  It would develop two heads.
C)  Legs would grow out of its head.
D)  It would not grow legs.
E)  It would not have segments.

Question 16

In the section "Investigating Life: Evolving Backwards," how did the scientists test the hypothesis?

Accepted Answer

A)  Examined decrease in length of hindlimbs in land-dwelling snakes.
B)  Compared anatomy of fossil ancestors and extant snakes.
C)  Examined decrease in length of hindlimbs in marine snakes.
D)  Compared terrestrial,freshwater,and marine snakes.
E)  Compared anatomy of snakes,other reptiles,mammals,and birds.

Question 17

The observation that most aquatic animals,like fish,penguins,and whales,all have streamlined bodies and fins or flippers for steering are a result of

Accepted Answer

A)  sexual selection.
B)  artificial selection.
C)  analogous selection.
D)  vestigial selection.
E)  convergent evolution.

Question 18

The sequence of eras beginning with the earliest era and proceeding forward to the most recent era in the geologic time scale is

Accepted Answer

A)  Archean - Mesozoic - Cenozoic.
B)  Cenozoic - Archean - Mesozoic.
C)  Archean - Paleozoic - ProterozoiC.
D)  Mesozoic - Cenozoic - Paleozoic.
E)  Paleozoic - Mesozoic - Cenozoic.

Question 19

Absolute dating uses ______ to estimate how old a fossil is.

Accepted Answer

A)  depth within rock layers
B)  radioactive isotopes
C)  a molecular clock
D)  structural features
E)  embryonic structures

Question 20

If many genes from two species differ in about 5% of their bases and substitutions occur at an estimated rate of 5% per one million years,approximately how many years have passed since the two species diverged?

Accepted Answer

A)  1 million.
B)  5 million.
C)  10 million.
D)  20 million.
E)  50 million.

Exam 13: Evidence of Evolution

The observation that most aquatic animals,like fish,penguins,and whales,all have streamlined bodies and fins or flippers for steering are a result of

Correct Answer
verified

Which of the following is least likely to be preserved as a fossil?

Correct Answer
verified

The sequence of eras beginning with the earliest era and proceeding forward to the most recent era in the geologic time scale is

Correct Answer
verified

What was hypothesized about the loss of legs in modern-day snakes?

Correct Answer
verified

Within the country of Indonesia,the island of Sumatra has tigers and rhinos,while to the East,the island of Sulawesi has cockatoos and tree kangaroos.What is the best explanation for this observation?

Correct Answer
verified

The half life of ¹⁴C is 5,730 years.If you test a fossilized bone and find that it has 1/8th the ¹⁴C as a modern bone,you could conclude that it is approximately __ years old.

Correct Answer
verified

The number of differences between cytochrome c of humans and cytochrome c of other organisms is as follows: Rhesus monkey - 1 difference;pigeon - 12 differences;fruit fly - 24 differences.The order in which these species are most similar to humans is

Correct Answer
verified

In the section "Investigating Life: Evolving Backwards," what is the significance of the marine fossil snakes (highlighted in the figure) ?

Correct Answer
verified

Earth once consisted of a single large landmass and one ocean.The landmass is named

Correct Answer
verified

When ocean levels dropped about 70 million years ago,marsupial mammals moved into North America and displaced many of the placental mammal species.

Correct Answer
verified

Fossils may be

Correct Answer
verified

Absolute dating uses ______ to estimate how old a fossil is.

Correct Answer
verified

Correct Answer
verified

If many genes from two species differ in about 5% of their bases and substitutions occur at an estimated rate of 5% per one million years,approximately how many years have passed since the two species diverged?

Correct Answer
verified

Dinosaurs lived essentially during the Paleozoic era.

Correct Answer
verified

If similarities between two structures in different organisms reflect common ancestry,these structures are

Correct Answer
verified

In a fruit fly embryo,the end that becomes the head contains high amounts of the protein bicoid.What may happen if you injected high levels of bicoid in the other end of the embryo?

Correct Answer
verified

Which of the following is most likely to be preserved as a fossil?

Correct Answer
verified

What is needed to estimate species relatedness with a molecular clock?

Correct Answer
verified

In the section "Investigating Life: Evolving Backwards," how did the scientists test the hypothesis?

Correct Answer
verified

Exam 13: Evidence of Evolution

The observation that most aquatic animals,like fish,penguins,and whales,all have streamlined bodies and fins or flippers for steering are a result of

Correct AnswerverifiedShow Answer

Which of the following is least likely to be preserved as a fossil?

Correct AnswerverifiedShow Answer

The sequence of eras beginning with the earliest era and proceeding forward to the most recent era in the geologic time scale is

Correct AnswerverifiedShow Answer

What was hypothesized about the loss of legs in modern-day snakes?

Correct AnswerverifiedShow Answer

Within the country of Indonesia,the island of Sumatra has tigers and rhinos,while to the East,the island of Sulawesi has cockatoos and tree kangaroos.What is the best explanation for this observation?

Correct AnswerverifiedShow Answer

The half life of 14C is 5,730 years.If you test a fossilized bone and find that it has 1/8th the 14C as a modern bone,you could conclude that it is approximately __ years old.

Correct AnswerverifiedShow Answer

The number of differences between cytochrome c of humans and cytochrome c of other organisms is as follows: Rhesus monkey - 1 difference;pigeon - 12 differences;fruit fly - 24 differences.The order in which these species are most similar to humans is

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Evolving Backwards," what is the significance of the marine fossil snakes (highlighted in the figure) ?

Correct AnswerverifiedShow Answer

Earth once consisted of a single large landmass and one ocean.The landmass is named

Correct AnswerverifiedShow Answer

When ocean levels dropped about 70 million years ago,marsupial mammals moved into North America and displaced many of the placental mammal species.

Correct AnswerverifiedShow Answer

Fossils may be

Correct AnswerverifiedShow Answer

Absolute dating uses ______ to estimate how old a fossil is.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If many genes from two species differ in about 5% of their bases and substitutions occur at an estimated rate of 5% per one million years,approximately how many years have passed since the two species diverged?

Correct AnswerverifiedShow Answer

Dinosaurs lived essentially during the Paleozoic era.

Correct AnswerverifiedShow Answer

If similarities between two structures in different organisms reflect common ancestry,these structures are

Correct AnswerverifiedShow Answer

In a fruit fly embryo,the end that becomes the head contains high amounts of the protein bicoid.What may happen if you injected high levels of bicoid in the other end of the embryo?

Correct AnswerverifiedShow Answer

Which of the following is most likely to be preserved as a fossil?

Correct AnswerverifiedShow Answer

What is needed to estimate species relatedness with a molecular clock?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Evolving Backwards," how did the scientists test the hypothesis?

Correct AnswerverifiedShow Answer

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The half life of ¹⁴C is 5,730 years.If you test a fossilized bone and find that it has 1/8th the ¹⁴C as a modern bone,you could conclude that it is approximately __ years old.

Correct Answer
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Correct Answer
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