SC160 Lesson 5 & 6 Exam SCORE 100 PERCENT
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…
