SC160 Lesson 5 & 6 Exam SCORE 100 PERCENT

Which one of the following is the only domain that contains eukaryotes?

Question options:

Animalia

Plantae

Archaea

Eukarya

Question 2

2.5 / 2.5 points

RNAs that can act as enzymes are called:

Question options:

ribozymes.

ATPs.

lysosomes.

prokaryotes.

Question 3

2.5 / 2.5 points

You discover a prokaryote that can make its own food in the absence of light. Nutritionally, you would classify this prokaryote as a:

Question options:

chemoautotroph.

photoheterotroph.

photoautotroph.

heterotroph.

Question 4

2.5 / 2.5 points

The science of naming, identifying, and classifying organisms is called:

Question options:

biogeography.

zoography.

phylogeny.

taxonomy.

Question 5

2.5 / 2.5 points

Which of the following is a colonial form of green algae?

Question options:

Volvox

Giardia

Paramecium

Plasmodium

Question 6

2.5 / 2.5 points

Which of the following is NOT true?

Question options:

The great diversification of animals occurred during the Cambrian explosion.

For most of biological history, life was confined to aquatic habitats.

The evolution of multicellularity took place after the origin of the eukaryotes.

The first organisms to colonize land were animals.

Question 7

2.5 / 2.5 points

Feathers in birds appear to have first evolved for insulation but later conveyed a new advantage in helping create light aerodynamic surfaces. This switch in function is an example of:

Question options:

paedomorphosis.

punctuated equilibrium.

convergent evolution.

an exaptation.

Question 8

2.5 / 2.5 points

Molecular systematics might examine all of the following types of data EXCEPT:

Question options:

proteins.

DNA sequences.

amino acid sequences.

anatomical features.

Question 9

2.5 / 2.5 points

__________ are responsible for toxic red tides.

Question options:

Plasmodial slime molds

Dinoflagellates

Red algae

Diatoms

Question 10

2.5 / 2.5 points

Speciation requires:

Question options:

periods of rapid evolutionary change.

geographic isolation.

long periods of time.

genetic isolation.

Question 11

2.5 / 2.5 points

An ancestral species and all its evolutionary descendants define a:

Question options:

outgroup.

clade.

genus.

ingroup.

Question 12

2.5 / 2.5 points

Prokaryotes reproduce by means of:

Question options:

mitosis.

binary fission.

budding.

meiosis.

Question 13

2.5 / 2.5 points

Endosymbiosis explains the origin of the __________ of eukaryotes.

Question options:

chloroplasts and mitochondria

endomembrane system

nuclear envelope

membrane-bound organelles

Question 14

2.5 / 2.5 points

Which of the following would be an example of paedomorphosis?

Question options:

Starfish regenerating severed limbs

Rapid evolution in a small, isolated population

Two species evolving a similar appearance

The ability to reproduce evolving in caterpillars

Question 15

2.5 / 2.5 points

The wing of a penguin is __________ the wing of a butterfly.

Question options:

structurally identical to

superior to

homologous to

analogous to

Question 16

2.5 / 2.5 points

The absence of __________ in the primitive atmosphere was essential to the origin of life on Earth.

Question options:

N₂

CO₂

CH₄

O₂

Question 17

2.5 / 2.5 points

A period of mass extinction is often followed by:

Question options:

explosive diversification.

nonbranching evolution.

global cooling.

equilibrium.

Question 18

2.5 / 2.5 points

Land was first colonized about __________ years ago.

Question options:

100 million

500 million

1.7 billion

2.5 billion

Question 19

2.5 / 2.5 points

Of the following taxonomic levels, species found within the same __________ are the most closely related.

Question options:

family

phylum

order

domain

Question 20

2.5 / 2.5 points

Variation among pre-cells was due to:

Question options:

genetic drift.

natural selection.

the bottleneck effect.

mutation.

Lesson 5 Exam

Question 21

2.5 / 2.5 points

Which one of the following statements is true?

Question options:

Natural selection works on variation already present in a population.

Natural selection works on non-heritable traits.

Individuals evolve through natural selection.

Organisms evolve structures that they need.

Question 22

2.5 / 2.5 points

The oldest known fossils are from about __________ years ago.

Question options:

3.5 billion

6,000

4.0 million

1.0 billion

Question 23

2.5 / 2.5 points

While on the Beagle, Darwin was influenced by a book by Charles Lyell that suggested that Earth was __________ and sculpted by geologic processes that __________ today.

Question options:

old; continue

old; no longer occur

young; continue

young; no longer occur

Question 24

2.5 / 2.5 points

The human genome contains approximately __________ genes.

Question options:

1,000-2,000

50,000-60,000

21,000

2,000-3,000

Question 25

2.5 / 2.5 points

Which one of the following can create new alleles?

Question options:

Bottleneck Effect

Sexual reproduction

Mutation

Founder Effect

Question 26

2.5 / 2.5 points

The presence of freckles is due to a dominant allele. Four percent of the individuals in a particular population lack freckles. Use the Hardy-Weinberg formula to calculate the percentage of individuals in this population who are homozygous dominant for freckles.

Question options:

32%

4%

64%

80%

Question 27

2.5 / 2.5 points

Your family is taking a long driving vacation across the midwestern and western United States. As you travel, you notice that the flowers, birds, and trees of the Midwest and the Rocky Mountains are very different. As you ponder why, you remember that such differences in the distribution of species are part of the field of:

Question options:

paleontology.

geology.

biogeography.

morphology.

Question 28

2.5 / 2.5 points

The Human Genome Project has the potential to:

Question options:

lead to treatments for inherited diseases.

lead to treatments for contagious diseases.

increase our understanding of the historical relationships among species.

play a role in all of the above answer choices.

Question 29

2.5 / 2.5 points

The possibility that Mongolian ruler Genghis Khan spread an unusual chromosome to nearly 16 million men living today resulted from studies of:

Question options:

proteomics.

cDNA.

the X chromosome.

the Y chromosome.

Question 30

2.5 / 2.5 points

A DNA fragment with a sticky end that reads -ATTCG will bind with another DNA fragment with a sticky end that reads:

Question options:

TAAGC-.

CGGAT-.

GCCTA-.

ATTGC-.

Question 31

2.5 / 2.5 points

Genetically modifying human __________ cells may directly affect future generations.

Question options:

intestinal

immune

gametic

somatic

Question 32

2.5 / 2.5 points

The scientific field that studies complete sets of genes is called:

Question options:

genomics.

recombinant DNA.

proteomics.

restriction enzyme.

Question 33

2.5 / 2.5 points

Which enzyme is used to bind DNA fragments together?

Question options:

Restriction enzyme

Telomerase

DNA ligase

DNA polymerase

Question 34

2.5 / 2.5 points

Which of the following is NOT a requirement of natural selection?

Question options:

Differential reproductive success

Overproduction of offspring

Genetic variation

Catastrophic events

Question 35

2.5 / 2.5 points

The total collection of alleles in a population at any one time make up that population’s:

Question options:

gene pool.

genotype.

heterozygosity.

polymorphic pool.

Question 36

2.5 / 2.5 points

You are attempting to link an individual to a crime. The only evidence you have is a tiny drop of blood. How can you use this drop of blood to make the association?

Question options:

You can use the sample to determine the individual’s ABO blood group.

You can use gel electrophoresis to determine the length of the DNA found in the sample.

You can use PCR to increase the amount of DNA available for restriction fragment analysis.

You can use the sample to check for the presence of the Rhesus factor.

Question 37

2.5 / 2.5 points

Natural selection results in:

Question options:

increased genetic variation.

a population that is better adapted to a future environment.

a population that is adapted to its current environment.

an increase in the size of a population.

Question 38

2.5 / 2.5 points

Which of the following is most likely to decrease genetic variation?

Question options:

Directional selection

Mutation

Stabilizing selection

Diversifying selection

Question 39

2.5 / 2.5 points

Nucleic acid probes are used to:

Question options:

find a specific nucleotide sequence.

isolate bacterial genes.

destroy clones that do not carry the recombinant plasmid of interest.

synthesize a RNA strand complementary to a stickyend.

Question 40

2.5 / 2.5 points

A collection of cloned DNA fragments that includes an organism’s entire genome is called a:

Question options:

phenotypic library.

gene repository.

clone collection.

genomic library.

Which one of the following is the only domain that contains eukaryotes?

Question options:

Animalia

Plantae

Archaea

Eukarya

Question 2

2.5 / 2.5 points

RNAs that can act as enzymes are called:

Question options:

ribozymes.

ATPs.

lysosomes.

prokaryotes.

Question 3

2.5 / 2.5 points

You discover a prokaryote that can make its own food in the absence of light. Nutritionally, you would classify this prokaryote as a:

Question options:

chemoautotroph.

photoheterotroph.

photoautotroph.

heterotroph.

Question 4

2.5 / 2.5 points

The science of naming, identifying, and classifying organisms is called:

Question options:

biogeography.

zoography.

phylogeny.

taxonomy.

Question 5

2.5 / 2.5 points

Which of the following is a colonial form of green algae?

Question options:

Volvox

Giardia

Paramecium

Plasmodium

Question 6

2.5 / 2.5 points

Which of the following is NOT true?

Question options:

The great diversification of animals occurred during the Cambrian explosion.

For most of biological history, life was confined to aquatic habitats.

The evolution of multicellularity took place after the origin of the eukaryotes.

The first organisms to colonize land were animals.

Question 7

2.5 / 2.5 points

Feathers in birds appear to have first evolved for insulation but later conveyed a new advantage in helping create light aerodynamic surfaces. This switch in function is an example of:

Question options:

paedomorphosis.

punctuated equilibrium.

convergent evolution.

an exaptation.

Question 8

2.5 / 2.5 points

Molecular systematics might examine all of the following types of data EXCEPT:

Question options:

proteins.

DNA sequences.

amino acid sequences.

anatomical features.

Question 9

2.5 / 2.5 points

__________ are responsible for toxic red tides.

Question options:

Plasmodial slime molds

Dinoflagellates

Red algae

Diatoms

Question 10

2.5 / 2.5 points

Speciation requires:

Question options:

periods of rapid evolutionary change.

geographic isolation.

long periods of time.

genetic isolation.

Question 11

2.5 / 2.5 points

An ancestral species and all its evolutionary descendants define a:

Question options:

outgroup.

clade.

genus.

ingroup.

Question 12

2.5 / 2.5 points

Prokaryotes reproduce by means of:

Question options:

mitosis.

binary fission.

budding.

meiosis.

Question 13

2.5 / 2.5 points

Endosymbiosis explains the origin of the __________ of eukaryotes.

Question options:

chloroplasts and mitochondria

endomembrane system

nuclear envelope

membrane-bound organelles

Question 14

2.5 / 2.5 points

Which of the following would be an example of paedomorphosis?

Question options:

Starfish regenerating severed limbs

Rapid evolution in a small, isolated population

Two species evolving a similar appearance

The ability to reproduce evolving in caterpillars

Question 15

2.5 / 2.5 points

The wing of a penguin is __________ the wing of a butterfly.

Question options:

structurally identical to

superior to

homologous to

analogous to

Question 16

2.5 / 2.5 points

The absence of __________ in the primitive atmosphere was essential to the origin of life on Earth.

Question options:

N₂

CO₂

CH₄

O₂

Question 17

2.5 / 2.5 points

A period of mass extinction is often followed by:

Question options:

explosive diversification.

nonbranching evolution.

global cooling.

equilibrium.

Question 18

2.5 / 2.5 points

Land was first colonized about __________ years ago.

Question options:

100 million

500 million

1.7 billion

2.5 billion

Question 19

2.5 / 2.5 points

Of the following taxonomic levels, species found within the same __________ are the most closely related.

Question options:

family

phylum

order

domain

Question 20

2.5 / 2.5 points

Variation among pre-cells was due to:

Question options:

genetic drift.

natural selection.

the bottleneck effect.

mutation.

Lesson 5 Exam

Question 21

2.5 / 2.5 points

Which one of the following statements is true?

Question options:

Natural selection works on variation already present in a population.

Natural selection works on non-heritable traits.

Individuals evolve through natural selection.

Organisms evolve structures that they need.

Question 22

2.5 / 2.5 points

The oldest known fossils are from about __________ years ago.

Question options:

3.5 billion

6,000

4.0 million

1.0 billion

Question 23

2.5 / 2.5 points

While on the Beagle, Darwin was influenced by a book by Charles Lyell that suggested that Earth was __________ and sculpted by geologic processes that __________ today.

Question options:

old; continue

old; no longer occur

young; continue

young; no longer occur

Question 24

2.5 / 2.5 points

The human genome contains approximately __________ genes.

Question options:

1,000-2,000

50,000-60,000

21,000

2,000-3,000

Question 25

2.5 / 2.5 points

Which one of the following can create new alleles?

Question options:

Bottleneck Effect

Sexual reproduction

Mutation

Founder Effect

Question 26

2.5 / 2.5 points

The presence of freckles is due to a dominant allele. Four percent of the individuals in a particular population lack freckles. Use the Hardy-Weinberg formula to calculate the percentage of individuals in this population who are homozygous dominant for freckles.

Question options:

32%

4%

64%

80%

Question 27

2.5 / 2.5 points

Your family is taking a long driving vacation across the midwestern and western United States. As you travel, you notice that the flowers, birds, and trees of the Midwest and the Rocky Mountains are very different. As you ponder why, you remember that such differences in the distribution of species are part of the field of:

Question options:

paleontology.

geology.

biogeography.

morphology.

Question 28

2.5 / 2.5 points

The Human Genome Project has the potential to:

Question options:

lead to treatments for inherited diseases.

lead to treatments for contagious diseases.

increase our understanding of the historical relationships among species.

play a role in all of the above answer choices.

Question 29

2.5 / 2.5 points

The possibility that Mongolian ruler Genghis Khan spread an unusual chromosome to nearly 16 million men living today resulted from studies of:

Question options:

proteomics.

cDNA.

the X chromosome.

the Y chromosome.

Question 30

2.5 / 2.5 points

A DNA fragment with a sticky end that reads -ATTCG will bind with another DNA fragment with a sticky end that reads:

Question options:

TAAGC-.

CGGAT-.

GCCTA-.

ATTGC-.

Question 31

2.5 / 2.5 points

Genetically modifying human __________ cells may directly affect future generations.

Question options:

intestinal

immune

gametic

somatic

Question 32

2.5 / 2.5 points

The scientific field that studies complete sets of genes is called:

Question options:

genomics.

recombinant DNA.

proteomics.

restriction enzyme.

Question 33

2.5 / 2.5 points

Which enzyme is used to bind DNA fragments together?

Question options:

Restriction enzyme

Telomerase

DNA ligase

DNA polymerase

Question 34

2.5 / 2.5 points

Which of the following is NOT a requirement of natural selection?

Question options:

Differential reproductive success

Overproduction of offspring

Genetic variation

Catastrophic events

Question 35

2.5 / 2.5 points

The total collection of alleles in a population at any one time make up that population’s:

Question options:

gene pool.

genotype.

heterozygosity.

polymorphic pool.

Question 36

2.5 / 2.5 points

You are attempting to link an individual to a crime. The only evidence you have is a tiny drop of blood. How can you use this drop of blood to make the association?

Question options:

You can use the sample to determine the individual’s ABO blood group.

You can use gel electrophoresis to determine the length of the DNA found in the sample.

You can use PCR to increase the amount of DNA available for restriction fragment analysis.

You can use the sample to check for the presence of the Rhesus factor.

Question 37

2.5 / 2.5 points

Natural selection results in:

Question options:

increased genetic variation.

a population that is better adapted to a future environment.

a population that is adapted to its current environment.

an increase in the size of a population.

Question 38

2.5 / 2.5 points

Which of the following is most likely to decrease genetic variation?

Question options:

Directional selection

Mutation

Stabilizing selection

Diversifying selection

Question 39

2.5 / 2.5 points

Nucleic acid probes are used to:

Question options:

find a specific nucleotide sequence.

isolate bacterial genes.

destroy clones that do not carry the recombinant plasmid of interest.

synthesize a RNA strand complementary to a stickyend.

Question 40

2.5 / 2.5 points

A collection of cloned DNA fragments that includes an organism’s entire genome is called a:

Question options:

phenotypic library.

gene repository.

clone collection.

genomic library.