SC160 Lesson 5 & 6 Exam SCORE 100 PERCENT

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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:

  


<i>Volvox</i>

 


<i>Giardia</i>

 


<i>Paramecium</i>

 


<i>Plasmodium</i>

 

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:

  


N<sub>2</sub>

 


CO<sub>2</sub>

 


CH<sub>4</sub>

 


O<sub>2</sub>

 

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.

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