BIO 345 Exam 3 Exam Questions &
Answers (Grade A+)
The theory of mosaic coevolution describes another way in which
coevolution can lead to diversity. Rather than looking at specific
outcomes between a pair of species or group of species, what does
it examine? -
correct answer ✅geographic variation in coevolutionary outcomes
Mosaic coevolution focuses on what type of variation in
coevolution between species pairs? -
correct answer ✅geographic
G. politella had no effect on woodland star, but still laid its eggs on
woodland star. -
correct answer ✅commensal
Woodland star had numerous pollinators besides G. politella, and
there was selective abortion of flower capsules. -
correct answer ✅antagonistic
G. politella acted as sole pollinator while woodland star was the
sole host for G. politella, and flower capsules rarely aborted. -
correct answer ✅mutualisticc
,BIO 345 Exam 3 Exam Questions &
Answers (Grade A+)
The coevolutionary relationship between insects and flowering
plants (angiosperms) has been widely documented. These
mutualisms are vastly credited with the proliferation of species in
both lineages. For example, the evolution of novel traits in beetles
enabled them to feed on angiosperms in new ways, significantly
broadening their niches. As a result of evolving new ways to feed
on angiosperms, beetle diversity increased by 100,000 species.
What type of coevolution correctly describes this result? -
correct answer ✅escape and radiate coevolution
In the oak-hickory forests of the Ozark region of Missouri and
Arkansas, several native bee pollinators belonging to the same
genus pollinate several species of plants also belonging to the same
genus. An entomologist studying this system in the early 1900s
documented that many of these pollinators favored single species
of plants when visiting flowers. In 2010, a graduate student decided
to revisit this plant-pollinator system and discovered that some of
the bee species had apparently gone extinct. Further observation
indicated that the extinct bees' preferred plant species were either
in decline or locally extinct. What type of coevolutionary system is
this? -
correct answer ✅obligate mutualism
, BIO 345 Exam 3 Exam Questions &
Answers (Grade A+)
Lichens can be observed growing on rocks and trees all over the
planet, even helping to build soil in areas where soil has been
removed or covered, such as occurs with a lava flow. Lichens are an
association between a fungal species and either a photosynthetic
algae or cyanobacteria. Each species receives benefits from the
other and neither species can survive without the other. What is
this type of coevolution interaction called? -
correct answer ✅mutualistic coevolution
An herbaceous plant grows throughout an altitudinal range on the
eastern face of the Rocky Mountains in Montana and relies on bees
for pollination. Only one species of bee pollinates the plant at the
highest altitude. This bee is larger and consumes large amounts of
nectar, resulting in lower seed set for the plant due to metabolic
cost. At lower elevations, other pollinators are present that do not
consume nectar, so the plant produces little to no nectar, thereby
increasing seed set. The bee exclusively pollinates this plant, so at
lower altitudes, there are significantly fewer bee colonies and they
are much smaller in size, reflecting the limitation of their food
source. This is an example of what type of coevolution? -
correct answer ✅mosaic
The influenza, or flu, virus kills thousands of people every year, with
periodic episodes where annual mortality has reached millions of
Answers (Grade A+)
The theory of mosaic coevolution describes another way in which
coevolution can lead to diversity. Rather than looking at specific
outcomes between a pair of species or group of species, what does
it examine? -
correct answer ✅geographic variation in coevolutionary outcomes
Mosaic coevolution focuses on what type of variation in
coevolution between species pairs? -
correct answer ✅geographic
G. politella had no effect on woodland star, but still laid its eggs on
woodland star. -
correct answer ✅commensal
Woodland star had numerous pollinators besides G. politella, and
there was selective abortion of flower capsules. -
correct answer ✅antagonistic
G. politella acted as sole pollinator while woodland star was the
sole host for G. politella, and flower capsules rarely aborted. -
correct answer ✅mutualisticc
,BIO 345 Exam 3 Exam Questions &
Answers (Grade A+)
The coevolutionary relationship between insects and flowering
plants (angiosperms) has been widely documented. These
mutualisms are vastly credited with the proliferation of species in
both lineages. For example, the evolution of novel traits in beetles
enabled them to feed on angiosperms in new ways, significantly
broadening their niches. As a result of evolving new ways to feed
on angiosperms, beetle diversity increased by 100,000 species.
What type of coevolution correctly describes this result? -
correct answer ✅escape and radiate coevolution
In the oak-hickory forests of the Ozark region of Missouri and
Arkansas, several native bee pollinators belonging to the same
genus pollinate several species of plants also belonging to the same
genus. An entomologist studying this system in the early 1900s
documented that many of these pollinators favored single species
of plants when visiting flowers. In 2010, a graduate student decided
to revisit this plant-pollinator system and discovered that some of
the bee species had apparently gone extinct. Further observation
indicated that the extinct bees' preferred plant species were either
in decline or locally extinct. What type of coevolutionary system is
this? -
correct answer ✅obligate mutualism
, BIO 345 Exam 3 Exam Questions &
Answers (Grade A+)
Lichens can be observed growing on rocks and trees all over the
planet, even helping to build soil in areas where soil has been
removed or covered, such as occurs with a lava flow. Lichens are an
association between a fungal species and either a photosynthetic
algae or cyanobacteria. Each species receives benefits from the
other and neither species can survive without the other. What is
this type of coevolution interaction called? -
correct answer ✅mutualistic coevolution
An herbaceous plant grows throughout an altitudinal range on the
eastern face of the Rocky Mountains in Montana and relies on bees
for pollination. Only one species of bee pollinates the plant at the
highest altitude. This bee is larger and consumes large amounts of
nectar, resulting in lower seed set for the plant due to metabolic
cost. At lower elevations, other pollinators are present that do not
consume nectar, so the plant produces little to no nectar, thereby
increasing seed set. The bee exclusively pollinates this plant, so at
lower altitudes, there are significantly fewer bee colonies and they
are much smaller in size, reflecting the limitation of their food
source. This is an example of what type of coevolution? -
correct answer ✅mosaic
The influenza, or flu, virus kills thousands of people every year, with
periodic episodes where annual mortality has reached millions of
