Question 1

In a fruit fly embryo,the homeotic gene Antp determines where legs grow.When the promoter of Antp is mutated,flies grow legs from their head instead of antennae.In this mutation

Accepted Answer

A)  Antp must be turned off in the body.
B)  the Antp protein is no longer functional.
C)  antennae grow where the legs would normally be found.
D)  Antp must be turned on in the heaD.
E)  Antp is turned off in the head.F) B) and C)
G) B) and D)

Question 2

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 3

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) A) and C)
G) A) and D)

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.F) All of the above
G) B) and E)

Question 5

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) None of the above

Question 6

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 7

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) B) and D)
G) A) and E)

Question 8

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 9

Skeletal organization relating to limbs used for movement in vertebrates would be an example of analogous structures.

Accepted Answer

A) True 
 B)False

Question 10

Potassium-40 is useful in determining the age of a fossil

Accepted Answer

A)  in samples less than 25,000 years of age.
B)  in samples of 40,000 to 50,000 years of age.
C)  in samples 300,000 years of age and older.
D)  in samples aged between 50,000 and 100,000 years of age.
E)  in samples aged between 100,000 years and 250,000 years.F) D) and E)
G) B) and E)

Question 11

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) A) and E)
G) A) and D)

Question 12

The abundant remains of ammonites in Oklahoma indicate

Accepted Answer

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

Question 13

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 then

Accepted Answer

A)  approximately 5 million years have passed since the two species diverged.
B)  approximately 3 million years have passed since the two species diverged.
C)  approximately 10 million years have passed since the two species diverged.
D)  approximately 20 million years have passed since the two species divergeD.
E)  approximately 200,000 years have passed since the two species diverged.F) None of the above
G) A) and B)

Exam 13: Evidence of Evolution

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 then

Correct Answer
verified

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 Answer
verified

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

Correct Answer
verified

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

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

Correct Answer
verified

The wings of a bat and an insect are examples of

Correct Answer
verified

Potassium-40 is useful in determining the age of a fossil

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

The abundant remains of ammonites in Oklahoma indicate

Correct Answer
verified

Skeletal organization relating to limbs used for movement in vertebrates would be an example of analogous structures.

Correct Answer
verified

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

Correct Answer
verified

In a fruit fly embryo,the homeotic gene Antp determines where legs grow.When the promoter of Antp is mutated,flies grow legs from their head instead of antennae.In this mutation

Correct Answer
verified

Exam 13: Evidence of Evolution

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 then

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

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

The wings of a bat and an insect are examples of

Correct AnswerverifiedShow Answer

Potassium-40 is useful in determining the age of a fossil

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

The abundant remains of ammonites in Oklahoma indicate

Correct AnswerverifiedShow Answer

Skeletal organization relating to limbs used for movement in vertebrates would be an example of analogous structures.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a fruit fly embryo,the homeotic gene Antp determines where legs grow.When the promoter of Antp is mutated,flies grow legs from their head instead of antennae.In this mutation

Correct AnswerverifiedShow Answer

Correct Answer
verified

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 Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

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Correct Answer
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Correct Answer
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Correct Answer
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