Question 1

Relative dating uses ________ to estimate how old a fossil is.

Accepted Answer

A)   radioactive isotopes
B)   a molecular clock
C)   structural features
D)   depth within rock layers
E)   embryonic structuresF) All of the above
G) None of the above

Question 2

During which period of the Paleozoic era did the first winged insects evolve?

Accepted Answer

A)   Carboniferous
B)   Devonian
C)   Cambrian
D)   Permian
E)   OrdovicianF) C) and E)
G) B) and D)

Question 3

The abundant remains of ammonites in Oklahoma indicate that Oklahoma was

Accepted Answer

A)   always a vast desert with almost no rainfall.
B)   once part of a mountain range that has now eroded.
C)   once covered by a shallow ocean.
D)   once part of a vast tropical forest.
E)   always a grassland.F) B) and E)
G) A) and B)

Question 4

The fossil record indicates that at one time marsupials were common to both Australia and South America,but today most South American marsupials have become extinct.The most probable explanation for marsupials being common to Australia yet not very common to South America today is that

Accepted Answer

A)   South American marsupials were displaced by placental mammals when a land bridge formed between North America and South America about seven million years ago.
B)   marsupials were able to flourish in South America because of its isolation from other land masses.
C)   placental mammals are less fully developed than marsupials when born and therefore have a better chance of survival after birth.
D)   South American and Australian marsupials interbred.
E)   marsupials can survive only in warm climates like Australia.F) A) and C)
G) D) and E)

Question 5

Any gene,when mutated,that leads to an organism with structures in abnormal or unusual places,is referred to as a(n) ________ gene.

Accepted Answer

A)   homeotic
B)   heterotic
C)   embryotic
D)   mutagenic
E)   vestigialF) D) and E)
G) B) and C)

Question 6

When a land bridge formed about 70 million years ago,marsupial mammals moved into South America and displaced many of the placental mammal species.

Accepted Answer

A) True 
 B)False

Question 7

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.F) B) and C)
G) A) and B)

Question 8

The wings of a bat and an insect are examples of

Accepted Answer

A)   analogous structures.
B)   homologous structures.
C)   vestigial structures.
D)   homeotic structures.
E)   heterologous structures.F) A) and E)
G) None of the above

Question 9

Which of the following pairs radioactive isotopes is used in radioactive fossil dating?

Accepted Answer

A)   ¹⁴C and ⁴⁰K
B)   ¹²C and ⁴⁰K
C)   ¹²C and ⁴⁰Ar
D)   ⁴⁰K and ¹⁴NE) A) and B)
F) A) and C)

Question 10

If many human genes differ in about 10% of their bases from another species' same genes and substitutions occur at an estimated rate of 2% per one million years,approximately how many years have passed since the two species diverged?

Accepted Answer

A)   5 million
B)   3 million
C)   10 million
D)   20 million
E)   200 millionF) C) and D)
G) B) and C)

Question 11

The femur in a snake and pelvis in a whale are examples of

Accepted Answer

A)   homologous structures.
B)   analogous structures.
C)   homeotic structures.
D)   vestigial structures.
E)   heterologous structures.F) All of the above
G) B) and E)

Question 12

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 landF) D) and E)
G) C) and E)

Question 13

The techniques used to study molecular evolution are based on the comparison of nucleotide and amino acid sequences among species.

Accepted Answer

A) True 
 B)False

Question 14

Placental mammals give birth to more fully developed offspring than marsupial mammals and therefore have a greater chance of survival.

Accepted Answer

A) True 
 B)False

Question 15

Amphibians,birds,and mammals look the most similar as

Accepted Answer

A)   newborns.
B)   embryos.
C)   adults.
D)   fossils.
E)   juveniles.F) A) and B)
G) A) and C)

Question 16

-In the section "Investigating Life: Evolving Backwards," 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.F) All of the above
G) B) and D)

Question 17

If an isotope's half-life is 100 years,then

Accepted Answer

A)   that isotope will no longer exist in 50 years.
B)   that isotope will no longer exist in 200 years.
C)   in 50 years only half of the atoms in a sample of that isotope will remain.
D)   in 100 years only half of the atoms in a sample of that isotope will remain.
E)   in 200 years only half of the atoms in a sample of that isotope will remainF) C) and D)
G) A) and D)

Question 18

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.F) B) and E)
G) B) and D)

Question 19

The fossil record is often incomplete,in part because scientists will never be able to discover some of the fossils that are buried deep in the earth and in part because some living things fossilize more readily than others.

Accepted Answer

A) True 
 B)False

Question 20

The half life of ¹⁴C is 5,730 years.11,460 years after an organism dies what percent of the initial ¹⁴C will still be present in the organism bones?

Accepted Answer

A)   50%
B)   25%
C)   75%
D)   100%
E)   0%F) D) and E)
G) B) and E)

Exam 13: Evidence of Evolution

Which of the following pairs radioactive isotopes is used in radioactive fossil dating?

Correct AnswerverifiedShow Answer

During which period of the Paleozoic era did the first winged insects evolve?

Correct AnswerverifiedShow Answer

Placental mammals give birth to more fully developed offspring than marsupial mammals and therefore have a greater chance of survival.

Correct AnswerverifiedShow Answer

Amphibians,birds,and mammals look the most similar as

Correct AnswerverifiedShow Answer

The femur in a snake and pelvis in a whale are examples of

Correct AnswerverifiedShow Answer

Fossils may be

Correct AnswerverifiedShow Answer

The abundant remains of ammonites in Oklahoma indicate that Oklahoma was

Correct AnswerverifiedShow Answer

The fossil record is often incomplete,in part because scientists will never be able to discover some of the fossils that are buried deep in the earth and in part because some living things fossilize more readily than others.

Correct AnswerverifiedShow Answer

The half life of ¹⁴C is 5,730 years.11,460 years after an organism dies what percent of the initial ¹⁴C will still be present in the organism bones?

Correct AnswerverifiedShow Answer

Relative dating uses ________ to estimate how old a fossil is.

Correct AnswerverifiedShow Answer

If many human genes differ in about 10% of their bases from another species' same genes and substitutions occur at an estimated rate of 2% per one million years,approximately how many years have passed since the two species diverged?

Correct AnswerverifiedShow Answer

The fossil record indicates that at one time marsupials were common to both Australia and South America,but today most South American marsupials have become extinct.The most probable explanation for marsupials being common to Australia yet not very common to South America today is that

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

Any gene,when mutated,that leads to an organism with structures in abnormal or unusual places,is referred to as a(n) ________ gene.

Correct AnswerverifiedShow Answer

The techniques used to study molecular evolution are based on the comparison of nucleotide and amino acid sequences among species.

Correct AnswerverifiedShow Answer

When a land bridge formed about 70 million years ago,marsupial mammals moved into South America and displaced many of the placental mammal species.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If an isotope's half-life is 100 years,then

Correct AnswerverifiedShow Answer

-In the section "Investigating Life: Evolving Backwards," what was hypothesized about the loss of legs in modern-day snakes?

Correct AnswerverifiedShow Answer

The wings of a bat and an insect are examples of

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified