Bio 208 Exam 1 Questions With Complete Solutions
____ causes leaves to fall off as a result of predation or disease.
Correct Answers ethylene
A defining characteristic of sympatric speciation is
a. Asexually reproducing populations
b. Geographic isolation.
c. The appearance of new species in the midst of old ones
d. Large populations Correct Answers C
A plant subjected to long periods of drought would likely have a
thin cuticle. Correct Answers false
A plant with high levels of auxin and low levels of cytokinins
would appear: Correct Answers tall and thin
A plants chemical response to a herbivore insect trying to eat
that plant for food might impact evolution of that inspect species
through what method?
a. Mutations
b. Gene flow
c. Natural Selection
d. Genetic drift Correct Answers C
A population of birds colonizes an area in which the insects
upon which they feed live inside trees. Which of the following
events accounts for an observed increase in average beak size in
the bird population over time?
,a. Decreased fitness of small-beaked birds, creating a new
species
b. Increased fitness of large-beaked birds, leading to natural
selection
c. Increased fitness of the large-beaked birds, creating a new
species
d. Decreased fitness of the insects, allowing the birds to catch
them more easily Correct Answers B
A stoma consists of a _____.
a. pore surrounded by specialized guard cells
b. waxy substance found on the surface of a plant
c. water-conducting cell with vessel elements
d. gap where primary and secondary cell walls are missing
Correct Answers A
A subset of a population of birds leaves its habitat on the
mainland and colonizes a nearby island. The birds, after a period
of time, become reproductively isolated. The island sinks and
the population of birds that lived on the island returns to its
original habitat. Which of the following statements about these
bird populations is true?
a. The populations will not be able to interbreed because they
are different species.
b. The populations were sympatric while they diverged. c. The
populations will be able to interbreed even though they are
different species.
d. The birds were separated by a vicariance event. Correct
Answers A
, About 450 million years ago, the terrestrial landscape on Earth
would have _____.
a. had non-vascular green plants similar to liverworts forming
green mats on rock
b. been completely bare rock, with little pools that contained
bacteria and cyanobacteria
c. been covered with tall forests in swamps that became today's
coal
d. looked very similar to that of today, with flowers, grasses,
shrubs, and trees Correct Answers A
About thirteen different species of finches inhabit the Galápagos
Islands today, all descendants of a common ancestor from the
South American mainland that arrived a few million years ago.
Genetically, there are four distinct lineages, but the thirteen
species are currently classified among three genera. The first
lineage to diverge from the ancestral lineage was the warbler
finch (genus Certhidea). Next to diverge was the vegetarian
finch (genus Camarhynchus), followed by five tree finch species
(also in genus Camarhynchus) and six ground finch species
(genus Geospiza). If the six ground finch species have evolved
most recently, then which of these is the most logical
prediction?
a. Their genomes should be more similar to each other than are
the genomes of the five tree finch species.
b. The chances of hybridization between two ground finch
species should be less than the chances of hybridization between
two tree f Correct Answers A
____ causes leaves to fall off as a result of predation or disease.
Correct Answers ethylene
A defining characteristic of sympatric speciation is
a. Asexually reproducing populations
b. Geographic isolation.
c. The appearance of new species in the midst of old ones
d. Large populations Correct Answers C
A plant subjected to long periods of drought would likely have a
thin cuticle. Correct Answers false
A plant with high levels of auxin and low levels of cytokinins
would appear: Correct Answers tall and thin
A plants chemical response to a herbivore insect trying to eat
that plant for food might impact evolution of that inspect species
through what method?
a. Mutations
b. Gene flow
c. Natural Selection
d. Genetic drift Correct Answers C
A population of birds colonizes an area in which the insects
upon which they feed live inside trees. Which of the following
events accounts for an observed increase in average beak size in
the bird population over time?
,a. Decreased fitness of small-beaked birds, creating a new
species
b. Increased fitness of large-beaked birds, leading to natural
selection
c. Increased fitness of the large-beaked birds, creating a new
species
d. Decreased fitness of the insects, allowing the birds to catch
them more easily Correct Answers B
A stoma consists of a _____.
a. pore surrounded by specialized guard cells
b. waxy substance found on the surface of a plant
c. water-conducting cell with vessel elements
d. gap where primary and secondary cell walls are missing
Correct Answers A
A subset of a population of birds leaves its habitat on the
mainland and colonizes a nearby island. The birds, after a period
of time, become reproductively isolated. The island sinks and
the population of birds that lived on the island returns to its
original habitat. Which of the following statements about these
bird populations is true?
a. The populations will not be able to interbreed because they
are different species.
b. The populations were sympatric while they diverged. c. The
populations will be able to interbreed even though they are
different species.
d. The birds were separated by a vicariance event. Correct
Answers A
, About 450 million years ago, the terrestrial landscape on Earth
would have _____.
a. had non-vascular green plants similar to liverworts forming
green mats on rock
b. been completely bare rock, with little pools that contained
bacteria and cyanobacteria
c. been covered with tall forests in swamps that became today's
coal
d. looked very similar to that of today, with flowers, grasses,
shrubs, and trees Correct Answers A
About thirteen different species of finches inhabit the Galápagos
Islands today, all descendants of a common ancestor from the
South American mainland that arrived a few million years ago.
Genetically, there are four distinct lineages, but the thirteen
species are currently classified among three genera. The first
lineage to diverge from the ancestral lineage was the warbler
finch (genus Certhidea). Next to diverge was the vegetarian
finch (genus Camarhynchus), followed by five tree finch species
(also in genus Camarhynchus) and six ground finch species
(genus Geospiza). If the six ground finch species have evolved
most recently, then which of these is the most logical
prediction?
a. Their genomes should be more similar to each other than are
the genomes of the five tree finch species.
b. The chances of hybridization between two ground finch
species should be less than the chances of hybridization between
two tree f Correct Answers A
