Question
Question 16
In which statement would reproductive isolation most likely take place?
a
A species of squirrels becomes isolated from its shelter when a forest fire destroys its habitat.
b
A species of hawks becomes isolated from its food source when a flood wipes out all of its prey.
c
A species of lizards becomes isolated from its main population when a large canyon forms.
d
A species of deer becomes isolated from its water source when a fence is built around a pond.
Question 17
The diagram shows a population of fish species that live in a river ecosystem.
A small part of the population is geographically isolated from the rest of the population when a dam is built. The diagram shows the population 100 years after the dam was constructed.
Which statement BEST describes what would occur between the populations if the dam were removed?
a
The two populations would be able to reproduce with each other because they have a common ancestor.
b
The two populations would not be able to reproduce with each other because they became two different species.
c
The two populations would not be able to reproduce with each other because they have different appearances.
d
The two populations would be able to reproduce with each other because they have the same resources available.
Question 18
Ancient ammonites were mollusks that commonly became fossilized in marine sediment and show a continuous series of forms changing from uncoiled to coiled. Which pattern is predicted by such observations?
Ammonites, facts and photos
a
adaptive radiation
b
gene flow
c
punctuated equilibrium
d
gradualism
Question 19
Which is the best explanation of why DNA can be used to show relationships between species?
a
DNA sequences will be similar in species that are exposed to the same radiation sources.
b
DNA sequences will be similar in species that undergo the same catastrophic events.
c
DNA sequences will be similar among species that eat the same kinds of food.
d
DNA sequences will be similar in species that have evolved together through natural selection.
Question 20
Two organisms are closely related and are thought to share a similar evolutionary history. If this assumption is correct, what will be similar about these organisms?
a
They will have identical chromosomes.
b
They will have identical chromosomal mutations.
c
They will have no structural differences.
d
They will have comparable embryological development.
Question 21
What is the best technique for determining the evolutionary relationships among closely related species that still have living members?
a
homologous structure analysis
b
comparative anatomy
c
comparative embryology
d
DNA or RNA analysis
Question 22
Speciation, which leads to diversity among species through natural selection, occurs when
a
once similar species are no longer able to mate and produce fertile offspring.
b
organisms develop characteristics that mimics traits of a completely different species.
c
species experience change within their lineage and develop new characteristics.
d
species interact with other species in an ecosystem and develop similar traits to each other.
Question 23
Two graphs regarding a population of land snails are shown below.
f83f73e4-a9c4-4b99-aa61-190cd2c884b2
Which of these conclusions can be made using the two graphs?
a
Land snails that weigh more than 20 mg live longer than land snails that weigh less than 20 mg.
b
A weight of 5 mg has become a disadvantage for land snails living in this environment.
c
Heavier land snails migrated out of the area between 2000 and 201
d
Land snails that weigh 25 mg are eating land snails that weigh 5 mg.
Question 24
The picture shows a mole rat, a mammal that lives underground and is blind despite having eyes.
ada7662b-47bb-4994-be8e-e98b7aa5feda
The presence of useless eyes on a mole rat is evidence of which scientific theory?
a
the theory of evolution
b
the theory of cells
c
the theory of relativity
d
the theory of superposition
Question 25
Using the Hardy-Weinberg principle, if p = 0.3, what is q?
a
0.3
b
0.5
c
0.7
d
1.0
Question 26
In a population that is in Hardy-Weinberg equilibrium, the frequency of the recessive homozygote
genotype of a certain trait is 0.13. Calculate the percentage of individuals homozygous for the dominant
allele.
Hardy-Weinberg Study Guide | Inspirit
a
p^2= 29%
b
p^2= 40%
c
q^2= 57%
d
q^2= 23%
Question 27
You have sampled a population in which you know that the percentage of the homozygous dominant genotype (AA) is 16%.
Using that 16%, calculate the following - the frequency of the "A" allele. (p)
p2 + 2pq + q2 = 1 and p + q = 1
a
0.16
b
1
c
0.4
d
0.36
Question 28
When penicillin was first introduced, it was effective in destroying most of the bacteria that cause gonorrhea. Today, certain varieties of this bacterium are resistant to penicillin. Which statement best explains the appearance of these resistant varieties?
a
Penicillin stimulated the bacteria to become resistant, and the resistance was passed to the offspring.
b
Penicillin stimulated the production of antigens in the resistant bacteria.
c
Penicillin killed the susceptible bacteria, and naturally resistant variations survived to reproduce.
d
Penicillin used today is not as strong as the penicillin used when it was first introduced.
Question 29
The first vaccine to be developed protected people against
a
AIDS.
b
tetanus.
c
polio.
d
smallpox.
Question 30
Certain disease-causing bacteria reproduce about every 20 minutes. Some strains of such bacteria have become resistant to antibiotics that previously inhibited their growth. Over which period of time do such bacteria most likely become resistant to an antibiotic?
a
days
b
seconds
c
minutes
d
years
In which statement would reproductive isolation most likely take place?
a
A species of squirrels becomes isolated from its shelter when a forest fire destroys its habitat.
b
A species of hawks becomes isolated from its food source when a flood wipes out all of its prey.
c
A species of lizards becomes isolated from its main population when a large canyon forms.
d
A species of deer becomes isolated from its water source when a fence is built around a pond.
Question 17
The diagram shows a population of fish species that live in a river ecosystem.
A small part of the population is geographically isolated from the rest of the population when a dam is built. The diagram shows the population 100 years after the dam was constructed.
Which statement BEST describes what would occur between the populations if the dam were removed?
a
The two populations would be able to reproduce with each other because they have a common ancestor.
b
The two populations would not be able to reproduce with each other because they became two different species.
c
The two populations would not be able to reproduce with each other because they have different appearances.
d
The two populations would be able to reproduce with each other because they have the same resources available.
Question 18
Ancient ammonites were mollusks that commonly became fossilized in marine sediment and show a continuous series of forms changing from uncoiled to coiled. Which pattern is predicted by such observations?
Ammonites, facts and photos
a
adaptive radiation
b
gene flow
c
punctuated equilibrium
d
gradualism
Question 19
Which is the best explanation of why DNA can be used to show relationships between species?
a
DNA sequences will be similar in species that are exposed to the same radiation sources.
b
DNA sequences will be similar in species that undergo the same catastrophic events.
c
DNA sequences will be similar among species that eat the same kinds of food.
d
DNA sequences will be similar in species that have evolved together through natural selection.
Question 20
Two organisms are closely related and are thought to share a similar evolutionary history. If this assumption is correct, what will be similar about these organisms?
a
They will have identical chromosomes.
b
They will have identical chromosomal mutations.
c
They will have no structural differences.
d
They will have comparable embryological development.
Question 21
What is the best technique for determining the evolutionary relationships among closely related species that still have living members?
a
homologous structure analysis
b
comparative anatomy
c
comparative embryology
d
DNA or RNA analysis
Question 22
Speciation, which leads to diversity among species through natural selection, occurs when
a
once similar species are no longer able to mate and produce fertile offspring.
b
organisms develop characteristics that mimics traits of a completely different species.
c
species experience change within their lineage and develop new characteristics.
d
species interact with other species in an ecosystem and develop similar traits to each other.
Question 23
Two graphs regarding a population of land snails are shown below.
f83f73e4-a9c4-4b99-aa61-190cd2c884b2
Which of these conclusions can be made using the two graphs?
a
Land snails that weigh more than 20 mg live longer than land snails that weigh less than 20 mg.
b
A weight of 5 mg has become a disadvantage for land snails living in this environment.
c
Heavier land snails migrated out of the area between 2000 and 201
d
Land snails that weigh 25 mg are eating land snails that weigh 5 mg.
Question 24
The picture shows a mole rat, a mammal that lives underground and is blind despite having eyes.
ada7662b-47bb-4994-be8e-e98b7aa5feda
The presence of useless eyes on a mole rat is evidence of which scientific theory?
a
the theory of evolution
b
the theory of cells
c
the theory of relativity
d
the theory of superposition
Question 25
Using the Hardy-Weinberg principle, if p = 0.3, what is q?
a
0.3
b
0.5
c
0.7
d
1.0
Question 26
In a population that is in Hardy-Weinberg equilibrium, the frequency of the recessive homozygote
genotype of a certain trait is 0.13. Calculate the percentage of individuals homozygous for the dominant
allele.
Hardy-Weinberg Study Guide | Inspirit
a
p^2= 29%
b
p^2= 40%
c
q^2= 57%
d
q^2= 23%
Question 27
You have sampled a population in which you know that the percentage of the homozygous dominant genotype (AA) is 16%.
Using that 16%, calculate the following - the frequency of the "A" allele. (p)
p2 + 2pq + q2 = 1 and p + q = 1
a
0.16
b
1
c
0.4
d
0.36
Question 28
When penicillin was first introduced, it was effective in destroying most of the bacteria that cause gonorrhea. Today, certain varieties of this bacterium are resistant to penicillin. Which statement best explains the appearance of these resistant varieties?
a
Penicillin stimulated the bacteria to become resistant, and the resistance was passed to the offspring.
b
Penicillin stimulated the production of antigens in the resistant bacteria.
c
Penicillin killed the susceptible bacteria, and naturally resistant variations survived to reproduce.
d
Penicillin used today is not as strong as the penicillin used when it was first introduced.
Question 29
The first vaccine to be developed protected people against
a
AIDS.
b
tetanus.
c
polio.
d
smallpox.
Question 30
Certain disease-causing bacteria reproduce about every 20 minutes. Some strains of such bacteria have become resistant to antibiotics that previously inhibited their growth. Over which period of time do such bacteria most likely become resistant to an antibiotic?
a
days
b
seconds
c
minutes
d
years
Answers
Answered by
GPT-4o mini
Here are the answers to your questions:
**Question 16**
**c**: A species of lizards becomes isolated from its main population when a large canyon forms.
*Reason*: Geographic isolation is a key factor that can lead to reproductive isolation in species.
**Question 17**
**b**: The two populations would not be able to reproduce with each other because they became two different species.
*Reason*: Geographic isolation can lead to speciation over time; even if the dam is removed, genetic differences may prevent interbreeding.
**Question 18**
**d**: gradualism
*Reason*: The continuous series of forms changing from uncoiled to coiled indicates gradual changes over long periods.
**Question 19**
**d**: DNA sequences will be similar in species that have evolved together through natural selection.
*Reason*: Species that share a common ancestry typically have similar DNA sequences due to shared evolutionary history.
**Question 20**
**d**: They will have comparable embryological development.
*Reason*: Closely related species often show similarities in embryonic development due to shared evolutionary paths.
**Question 21**
**d**: DNA or RNA analysis
*Reason*: Molecular analysis provides precise information on genetic relationships among species.
**Question 22**
**a**: once similar species are no longer able to mate and produce fertile offspring.
*Reason*: Speciation typically occurs when populations diverge to the point they can no longer interbreed.
**Question 23**
**b**: A weight of 5 mg has become a disadvantage for land snails living in this environment.
*Reason*: If heavier snails tend to live longer as indicated, lighter snails may face disadvantages.
**Question 24**
**a**: the theory of evolution
*Reason*: Useless structures can be explained as vestigial traits, supporting the theory of evolution.
**Question 25**
**c**: 0.7
*Reason*: According to the Hardy-Weinberg principle, p + q = 1. If p = 0.3, then q = 1 - 0.3 = 0.7.
**Question 26**
**a**: p² = 29%
*Reason*: If the frequency of the recessive homozygote (q²) is 0.13 (13%), then q = √0.13, which is approximately 0.36; thus, p = 1 - 0.36 = 0.64, and p² ≈ 0.64² = 0.41 or 41%, but none of the options appear correct (assuming q² should be more fluid than an estimates).
**Question 27**
**c**: 0.4
*Reason*: If the homozygous dominant genotype (p²) is 16%, then p = √0.16 = 0.4 (the frequency of "A" allele).
**Question 28**
**c**: Penicillin killed the susceptible bacteria, and naturally resistant variations survived to reproduce.
*Reason*: This describes natural selection, where resistant bacteria have an advantage and pass on their resistance.
**Question 29**
**d**: smallpox.
*Reason*: Smallpox was the first vaccine developed, created by Edward Jenner.
**Question 30**
**a**: days
*Reason*: Given the quick reproduction rate of these bacteria, resistance could appear in a matter of days due to selective pressure from antibiotics.
If you have any further inquiries or would like additional explanations for these answers, feel free to ask!
**Question 16**
**c**: A species of lizards becomes isolated from its main population when a large canyon forms.
*Reason*: Geographic isolation is a key factor that can lead to reproductive isolation in species.
**Question 17**
**b**: The two populations would not be able to reproduce with each other because they became two different species.
*Reason*: Geographic isolation can lead to speciation over time; even if the dam is removed, genetic differences may prevent interbreeding.
**Question 18**
**d**: gradualism
*Reason*: The continuous series of forms changing from uncoiled to coiled indicates gradual changes over long periods.
**Question 19**
**d**: DNA sequences will be similar in species that have evolved together through natural selection.
*Reason*: Species that share a common ancestry typically have similar DNA sequences due to shared evolutionary history.
**Question 20**
**d**: They will have comparable embryological development.
*Reason*: Closely related species often show similarities in embryonic development due to shared evolutionary paths.
**Question 21**
**d**: DNA or RNA analysis
*Reason*: Molecular analysis provides precise information on genetic relationships among species.
**Question 22**
**a**: once similar species are no longer able to mate and produce fertile offspring.
*Reason*: Speciation typically occurs when populations diverge to the point they can no longer interbreed.
**Question 23**
**b**: A weight of 5 mg has become a disadvantage for land snails living in this environment.
*Reason*: If heavier snails tend to live longer as indicated, lighter snails may face disadvantages.
**Question 24**
**a**: the theory of evolution
*Reason*: Useless structures can be explained as vestigial traits, supporting the theory of evolution.
**Question 25**
**c**: 0.7
*Reason*: According to the Hardy-Weinberg principle, p + q = 1. If p = 0.3, then q = 1 - 0.3 = 0.7.
**Question 26**
**a**: p² = 29%
*Reason*: If the frequency of the recessive homozygote (q²) is 0.13 (13%), then q = √0.13, which is approximately 0.36; thus, p = 1 - 0.36 = 0.64, and p² ≈ 0.64² = 0.41 or 41%, but none of the options appear correct (assuming q² should be more fluid than an estimates).
**Question 27**
**c**: 0.4
*Reason*: If the homozygous dominant genotype (p²) is 16%, then p = √0.16 = 0.4 (the frequency of "A" allele).
**Question 28**
**c**: Penicillin killed the susceptible bacteria, and naturally resistant variations survived to reproduce.
*Reason*: This describes natural selection, where resistant bacteria have an advantage and pass on their resistance.
**Question 29**
**d**: smallpox.
*Reason*: Smallpox was the first vaccine developed, created by Edward Jenner.
**Question 30**
**a**: days
*Reason*: Given the quick reproduction rate of these bacteria, resistance could appear in a matter of days due to selective pressure from antibiotics.
If you have any further inquiries or would like additional explanations for these answers, feel free to ask!
There are no human answers yet. A form for humans to post answers is coming very soon!