BSC 196 Final Exam Questions With Correct
Answers
Which of the following is not a requirement of evolution by natural
| | | | | | | | | | | |
selection? - CORRECT ANSWER✔✔-random mating | | | |
Which of the following evolutionary processes leads to adaptations? -
| | | | | | | | | |
CORRECT ANSWER✔✔-natural selection | |
After the drought of 1977, researchers on the island of Daphne Major
| | | | | | | | | | | |
hypothesized that |
medium ground finches that had large, deep beaks, survived better than
| | | | | | | | | |
those with smaller
| | |
beaks because they could more easily crack and eat the tough Tribulus
| | | | | | | | | | | |
cistoides fruits. If this | | |
hypothesis is correct, what would you expect to observe if a population
| | | | | | | | | | | |
of these medium
| |
ground finches colonized a nearby island where Tribulus cistoides was
| | | | | | | | | |
the most abundant food
| | |
for the next 1000 years? Assume that (1) even the survivors of the 1977
| | | | | | | | | | | | | |
drought sometimes |
,had difficulty cracking the tough T. cistoides fruits and would eat other
| | | | | | | | | | | |
seeds when offered a | | |
choice; and (2) food availability is the primary limit on finch fitness on
| | | | | | | | | | | | |
this new island. - CORRECT ANSWER✔✔-evolution of yet larger, deeper
| | | | | | | | | |
beaks over time | |
Structures as different as human arms, bat wings, and dolphin flippers
| | | | | | | | | | |
contain many of the same bones, which develop from similar embryonic
| | | | | | | | | |
tissues. These structural similarities are an example of _____. -
| | | | | | | | | | |
CORRECT ANSWER✔✔-homology |
A farmer uses triazine herbicide to control pigweed in his field. For the
| | | | | | | | | | | | |
first few years, the
| | |
triazine works well and almost all the pigweed dies; but after several
| | | | | | | | | | | |
years, the farmer sees | | |
more and more pigweed. Which of these explanations best explains
| | | | | | | | | |
what happened? - CORRECT ANSWER✔✔-Triazine-resistant weeds were
| | | | | |
more likely to survive and reproduce.
| | | | | |
Claytonia virginica is a woodland spring herb with flowers that vary from
| | | | | | | | | | |
white to pale pink
| | | |
to bright pink. Slugs prefer to eat pink-flowering over white-flowering
| | | | | | | | | |
plants (due to chemical | | |
differences between the two), and plants experiencing severe herbivory
| | | | | | | | |
are more likely to die.
| | | |
,The bees that pollinate this plant also prefer pink to white flowers, so
| | | | | | | | | | | | |
that Claytonia with pink
| | |
flowers have greater relative fruit set (i.e., higher reproduction) than
| | | | | | | | | |
Claytonia with white | |
flowers. A researcher observes that the percentage of different flower
| | | | | | | | | |
colors remains stable in | | |
the study population from year to year. Given no other information, if
| | | | | | | | | | | |
the researcher removes
| |
all slugs from the study population, what do you expect to happen to
| | | | | | | | | | | | |
the distribution of flower
| | |
colors in the population over time? - CORRECT ANSWER✔✔-The
| | | | | | | | |
percentage of pink flowers should increase over time.| | | | | | |
Researchers discovered that a new strain of bacteria that cause
| | | | | | | | | |
tuberculosis (M. tuberculosis) | |
taken from a dead patient has a point mutation in the rpoB gene that
| | | | | | | | | | | | | |
codes for part of the RNA| | | | |
polymerase enzyme. This mutant form of RNA polymerase does not
| | | | | | | | | |
function as well as the | | | |
more common form of RNA polymerase. A commonly used antibiotic
| | | | | | | | | |
called rifampin does not | | |
affect the mutant rpoB bacteria.
| | | |
A researcher mixes M. tuberculosis with and without the rpoB mutation
| | | | | | | | | | |
and adds the bacteria
| | |
, to cell cultures. Half the cell cultures contain only standard nutrients,
| | | | | | | | | | |
while the other half of the | | | | |
cell cultures contain rifampin and the standard nutrients. After many
| | | | | | | | | |
cell generations, the
| |
researcher finds that _____. - CORRECT ANSWER✔✔-very few M.
| | | | | | | | |
tuberculosis in the standard nutrient cell cultures carry the rpoB gene
| | | | | | | | | |
mutation, but almost all of the M. tuberculosis in the cell cultures with
| | | | | | | | | | | | |
rifampin
carry the rpoB mutation | | |
Currently, two of the living elephant species (X and Y) are placed in the
| | | | | | | | | | | | | |
genus Loxodonta and | |
a third surviving species (Z) is placed in the genus Elephas. Assuming
| | | | | | | | | | | |
this classification reflects
| |
evolutionary relatedness, which of the following is the most accurate
| | | | | | | | | |
phylogenetic tree? - CORRECT ANSWER✔✔-Z | | | |
X
Y
Consider the following short DNA sequence consisting of five codons:
| | | | | | | | |
GTG GCG TGG ACT AAG
| | | |
How would this reading frame be altered if, during transcription, a
| | | | | | | | | | |
deletion occurred at the | | |
Answers
Which of the following is not a requirement of evolution by natural
| | | | | | | | | | | |
selection? - CORRECT ANSWER✔✔-random mating | | | |
Which of the following evolutionary processes leads to adaptations? -
| | | | | | | | | |
CORRECT ANSWER✔✔-natural selection | |
After the drought of 1977, researchers on the island of Daphne Major
| | | | | | | | | | | |
hypothesized that |
medium ground finches that had large, deep beaks, survived better than
| | | | | | | | | |
those with smaller
| | |
beaks because they could more easily crack and eat the tough Tribulus
| | | | | | | | | | | |
cistoides fruits. If this | | |
hypothesis is correct, what would you expect to observe if a population
| | | | | | | | | | | |
of these medium
| |
ground finches colonized a nearby island where Tribulus cistoides was
| | | | | | | | | |
the most abundant food
| | |
for the next 1000 years? Assume that (1) even the survivors of the 1977
| | | | | | | | | | | | | |
drought sometimes |
,had difficulty cracking the tough T. cistoides fruits and would eat other
| | | | | | | | | | | |
seeds when offered a | | |
choice; and (2) food availability is the primary limit on finch fitness on
| | | | | | | | | | | | |
this new island. - CORRECT ANSWER✔✔-evolution of yet larger, deeper
| | | | | | | | | |
beaks over time | |
Structures as different as human arms, bat wings, and dolphin flippers
| | | | | | | | | | |
contain many of the same bones, which develop from similar embryonic
| | | | | | | | | |
tissues. These structural similarities are an example of _____. -
| | | | | | | | | | |
CORRECT ANSWER✔✔-homology |
A farmer uses triazine herbicide to control pigweed in his field. For the
| | | | | | | | | | | | |
first few years, the
| | |
triazine works well and almost all the pigweed dies; but after several
| | | | | | | | | | | |
years, the farmer sees | | |
more and more pigweed. Which of these explanations best explains
| | | | | | | | | |
what happened? - CORRECT ANSWER✔✔-Triazine-resistant weeds were
| | | | | |
more likely to survive and reproduce.
| | | | | |
Claytonia virginica is a woodland spring herb with flowers that vary from
| | | | | | | | | | |
white to pale pink
| | | |
to bright pink. Slugs prefer to eat pink-flowering over white-flowering
| | | | | | | | | |
plants (due to chemical | | |
differences between the two), and plants experiencing severe herbivory
| | | | | | | | |
are more likely to die.
| | | |
,The bees that pollinate this plant also prefer pink to white flowers, so
| | | | | | | | | | | | |
that Claytonia with pink
| | |
flowers have greater relative fruit set (i.e., higher reproduction) than
| | | | | | | | | |
Claytonia with white | |
flowers. A researcher observes that the percentage of different flower
| | | | | | | | | |
colors remains stable in | | |
the study population from year to year. Given no other information, if
| | | | | | | | | | | |
the researcher removes
| |
all slugs from the study population, what do you expect to happen to
| | | | | | | | | | | | |
the distribution of flower
| | |
colors in the population over time? - CORRECT ANSWER✔✔-The
| | | | | | | | |
percentage of pink flowers should increase over time.| | | | | | |
Researchers discovered that a new strain of bacteria that cause
| | | | | | | | | |
tuberculosis (M. tuberculosis) | |
taken from a dead patient has a point mutation in the rpoB gene that
| | | | | | | | | | | | | |
codes for part of the RNA| | | | |
polymerase enzyme. This mutant form of RNA polymerase does not
| | | | | | | | | |
function as well as the | | | |
more common form of RNA polymerase. A commonly used antibiotic
| | | | | | | | | |
called rifampin does not | | |
affect the mutant rpoB bacteria.
| | | |
A researcher mixes M. tuberculosis with and without the rpoB mutation
| | | | | | | | | | |
and adds the bacteria
| | |
, to cell cultures. Half the cell cultures contain only standard nutrients,
| | | | | | | | | | |
while the other half of the | | | | |
cell cultures contain rifampin and the standard nutrients. After many
| | | | | | | | | |
cell generations, the
| |
researcher finds that _____. - CORRECT ANSWER✔✔-very few M.
| | | | | | | | |
tuberculosis in the standard nutrient cell cultures carry the rpoB gene
| | | | | | | | | |
mutation, but almost all of the M. tuberculosis in the cell cultures with
| | | | | | | | | | | | |
rifampin
carry the rpoB mutation | | |
Currently, two of the living elephant species (X and Y) are placed in the
| | | | | | | | | | | | | |
genus Loxodonta and | |
a third surviving species (Z) is placed in the genus Elephas. Assuming
| | | | | | | | | | | |
this classification reflects
| |
evolutionary relatedness, which of the following is the most accurate
| | | | | | | | | |
phylogenetic tree? - CORRECT ANSWER✔✔-Z | | | |
X
Y
Consider the following short DNA sequence consisting of five codons:
| | | | | | | | |
GTG GCG TGG ACT AAG
| | | |
How would this reading frame be altered if, during transcription, a
| | | | | | | | | | |
deletion occurred at the | | |
