Page 1 of 58
BIOS252 / BIOS 252 Final Exam Review Q & A (Latest
2025): Anatomy & Physiology II | A & P II -
Chamberlain
Farrell's studies of intertidal communities along the Oregon coast
demonstrated that .....ANSWER.....larger species of barnacles
could facilitate growth of algal communities by providing
protection from limpets, but smaller barnacles could not
A mudslide kills a large fraction of a population of a flower
species. The reduction in this flower population allows for an
increase in the population size of a fern that competes with the
flower. This is an example of .....ANSWER.....disturbance
A region that is experiencing very frequent disturbances of
intermediate intensity will most likely exhibit _____. If the
intensity of these disturbances increase noticeable, the region will
most likely exhibit _____. .....ANSWER.....secondary succession;
extinction of all life
,Page 2 of 58
In a hypothetical example of succession, the early succession
plants produce toxins that hinder both the subsequent
colonization of other early succession species and colonization by
later succession plants. this scenario fits the _____ model of
succession. .....ANSWER.....inhibition
The inability of a system to shift back to the original community
state, even after the original conditions have been restored, is
called .....ANSWER.....hysteresis
In the succession that followed the eruption of Mount St. Helens,
which organism played an important role as an ecosystem
engineer? .....ANSWER.....the pocket gopher Thomomys talpoides
Which statement about plants with nitrogen-fixing bacteria is
true? .....ANSWER.....They often play major roles in early
succession and they are often at a competitive disadvantage in
late succession due to the energetic costs involved in painting
their bacterial symbionts
,Page 3 of 58
Which statement concerning Cowles's early works n succession is
false? .....ANSWER.....Cowles assumed that plant assemblages
most distant from the lake's edge were the youngest.
Sousa's studies of southern California boulders showed that algal
succession is driven predominately by .....ANSWER.....inhibition
A forest community has reestablished itself after an ice storm
damages most, but not all, of the trees in one area. Which type
of succession best describes the reestablishment of the community
after the storm? .....ANSWER.....secondary
Sutherland's experiments showed that the capacity of the
tunicate Styela to dominate communities depends primarily on
.....ANSWER.....the presence or absence of fish predators
Which statement about Bertness and Shumway's studies of
succession in a New England salt marsh is true? .....ANSWER.....the
studies showed that the trajectory of succession in these salt
marshes can be altered by changing the salinity of the soil.
, Page 4 of 58
Suppose that you are in Glacier Bay, Alaska, and standing at a
location that is dominated by Dryas. If you moved towards the
edge of the glacier, you would most likely next encounter _____.
If you moved in the opposite direction, away from the edge of
the glacier, you would most likely next encounter _____.
.....ANSWER.....lichens and mosses; alders
Suppose a late succession plant that is surrounded by early
succession plats grow at a rate of 0.7 cm per day. If the early
succession plants are removed experimentally, the ate succession
plants are observed to grow at a rate of 0.6 cm per day. This
experiment shows the the early succession plants have a ____
effect on the late succession plants, and this observation is most
consistent with the ____ model of succession.
.....ANSWER.....positive; facilitation
Fire-tolerant plant species in the Amazon are _____ abundant at
the edges of forest fragments than inside the forest. The results is
BIOS252 / BIOS 252 Final Exam Review Q & A (Latest
2025): Anatomy & Physiology II | A & P II -
Chamberlain
Farrell's studies of intertidal communities along the Oregon coast
demonstrated that .....ANSWER.....larger species of barnacles
could facilitate growth of algal communities by providing
protection from limpets, but smaller barnacles could not
A mudslide kills a large fraction of a population of a flower
species. The reduction in this flower population allows for an
increase in the population size of a fern that competes with the
flower. This is an example of .....ANSWER.....disturbance
A region that is experiencing very frequent disturbances of
intermediate intensity will most likely exhibit _____. If the
intensity of these disturbances increase noticeable, the region will
most likely exhibit _____. .....ANSWER.....secondary succession;
extinction of all life
,Page 2 of 58
In a hypothetical example of succession, the early succession
plants produce toxins that hinder both the subsequent
colonization of other early succession species and colonization by
later succession plants. this scenario fits the _____ model of
succession. .....ANSWER.....inhibition
The inability of a system to shift back to the original community
state, even after the original conditions have been restored, is
called .....ANSWER.....hysteresis
In the succession that followed the eruption of Mount St. Helens,
which organism played an important role as an ecosystem
engineer? .....ANSWER.....the pocket gopher Thomomys talpoides
Which statement about plants with nitrogen-fixing bacteria is
true? .....ANSWER.....They often play major roles in early
succession and they are often at a competitive disadvantage in
late succession due to the energetic costs involved in painting
their bacterial symbionts
,Page 3 of 58
Which statement concerning Cowles's early works n succession is
false? .....ANSWER.....Cowles assumed that plant assemblages
most distant from the lake's edge were the youngest.
Sousa's studies of southern California boulders showed that algal
succession is driven predominately by .....ANSWER.....inhibition
A forest community has reestablished itself after an ice storm
damages most, but not all, of the trees in one area. Which type
of succession best describes the reestablishment of the community
after the storm? .....ANSWER.....secondary
Sutherland's experiments showed that the capacity of the
tunicate Styela to dominate communities depends primarily on
.....ANSWER.....the presence or absence of fish predators
Which statement about Bertness and Shumway's studies of
succession in a New England salt marsh is true? .....ANSWER.....the
studies showed that the trajectory of succession in these salt
marshes can be altered by changing the salinity of the soil.
, Page 4 of 58
Suppose that you are in Glacier Bay, Alaska, and standing at a
location that is dominated by Dryas. If you moved towards the
edge of the glacier, you would most likely next encounter _____.
If you moved in the opposite direction, away from the edge of
the glacier, you would most likely next encounter _____.
.....ANSWER.....lichens and mosses; alders
Suppose a late succession plant that is surrounded by early
succession plats grow at a rate of 0.7 cm per day. If the early
succession plants are removed experimentally, the ate succession
plants are observed to grow at a rate of 0.6 cm per day. This
experiment shows the the early succession plants have a ____
effect on the late succession plants, and this observation is most
consistent with the ____ model of succession.
.....ANSWER.....positive; facilitation
Fire-tolerant plant species in the Amazon are _____ abundant at
the edges of forest fragments than inside the forest. The results is
