Bio 182 Exam 4: Post-Course Practice Exam|
With Questions And Verified Detailed And
Correct Answers| Oftenly Tested| Graded A+|
Guaranteed Pass.
If a bird song promotes an individual's ability to attract a mate and reproduce, then the song has
a(n) _____ function. - ANSWER ✔✔ Adaptive
Many female birds establish a pair bond with a single male with whom they build a nest and rear
young. Many of those females, however, also copulate with other males outside the pair bond;
the young they raise are fathered by more than one male. If we want to understand how this
behavior originated and how it may have changed over time, we want to understand its: -
ANSWER ✔✔ evolutionary history
In many high elevation lakes in the western United States, large fish are completely absent. In
some of these lakes, trout and other non-native fish have been stocked so humans can fish them
recreationally. Some biologists are concerned that the trout might be having a negative impact on
an endangered frog species that lives in the lakes. When these frogs are young tadpoles, they
feed on algae at the surface of the water were they are most exposed and susceptible to predators.
To avoid being eaten, some tadpoles exhibit "timid" behavior, spending more time hiding than
feeding. Tadpoles exhibiting more "bold" behavior hide less and obtain more food in lakes
without fish. However, in lakes with trout, they are much more likely to be eaten by the fish
predators. Biologists hypothesize that timid behavior is an adaptation in lakes that contain non-
native trout.
Ten years after trout have been introduced into lakes, resea - ANSWER ✔✔ bold or timid
behaviors are determined by genes
Overlap of niches can be minimized through: - ANSWER ✔✔ resource partitioning
The graph right depicts population growth of organisms under contrasting assumptions. The
population growth models under both assumptions are indicated by two lines, line A and line B
(labeled in the figure). The dotted line represents the carrying capacity.
A plausible explanation of why the two lines are similar at the point indicated by the large arrow
that says "Here" on the figure would be: Select only ONE answer choice. - ANSWER ✔✔ at that
time point, the two populations are not resource limited
The graph on the right shows that the number of organisms in an isolated population over time.
In which part of the curve is the death rate and emigration rate equal to the birth rate and
immigration rate, respectively? Select only ONE answer choice. - ANSWER ✔✔ III (The top of
the parabola)
, Given the graph depicted on the right, in which region of the population growth curve is the
death rate likely exceeding the birth rate? - ANSWER ✔✔ Location C (the decreasing point on
graph)
Given the relationship demonstrated in the graph right, where is this population likely to be in
their growth curve (growth curve below, has labels A, B and C on it). - ANSWER ✔✔ Location
A (the increasing point on the graph)
You are studying a population of vultures in Ohio. While in the field, over time you observe an
increase in the degree of intraspecific competition for resources. Additionally, as time
progresses, you observe that some individuals become susceptible to certain diseases that
typically occur in populations at high densities. Lastly, during your time studying this population
you do not observe any natural disasters or major weather events in the area. Based on this
information, which line in the graph to the right best represents the patterns of growth of the
population of vultures to date? - ANSWER ✔✔ Line C (the logistic curve)
From Question 6 graph above, but ignore the prompt in question 6)
What does Line C represent in the graph in question 6? - ANSWER ✔✔ Logistic population
growth
You are working with local conservation agencies to monitor a key population of Gila monsters
living in the Sonoran Desert (pictured right). Previous studies estimate that the typical carrying
capacity of Gila monster populations is 50 individuals. You estimate the population size of Gila
monsters in this area to be 25 individuals in 2009. Based on your research, you discover that Gila
monster populations typically have a per capita growth rate of 0.25. Based on this information,
estimate the number of Gila monsters in the population in the year 2010. If your calculation has
decimals, round up if your decimal is 0.5 or larger, round down if your decimal is below 0.5.
Select only ONE answer choice. - ANSWER ✔✔ 2010=28
In the logistic growth model, if N = K, then there will be no change in population size over time.
(Note - for this question only consider the mathematical equation, not a real population) -
ANSWER ✔✔ True
You recently discovered some interesting data online while searching for information about the
population growth of various countries. You notice that the population size of a particular
country has actually decreased each year over the last 5 years. Which of the following trends
would best explain why the population size of this country has decreased each year over this 5
year time period? Choose ONE column (A-C). - ANSWER ✔✔ A: immigration decrease,
emigration increases, births decrease, deaths increase
A marine ecologist counts the numbers of octopuses in three different intertidal regions that each
measure 3 hectares. The octopus counts are 4, 8, and 6 respectively. What is the BEST estimate
of the population density (octopus/hectare) for this particular species of octopus? - ANSWER
✔✔ 6
With Questions And Verified Detailed And
Correct Answers| Oftenly Tested| Graded A+|
Guaranteed Pass.
If a bird song promotes an individual's ability to attract a mate and reproduce, then the song has
a(n) _____ function. - ANSWER ✔✔ Adaptive
Many female birds establish a pair bond with a single male with whom they build a nest and rear
young. Many of those females, however, also copulate with other males outside the pair bond;
the young they raise are fathered by more than one male. If we want to understand how this
behavior originated and how it may have changed over time, we want to understand its: -
ANSWER ✔✔ evolutionary history
In many high elevation lakes in the western United States, large fish are completely absent. In
some of these lakes, trout and other non-native fish have been stocked so humans can fish them
recreationally. Some biologists are concerned that the trout might be having a negative impact on
an endangered frog species that lives in the lakes. When these frogs are young tadpoles, they
feed on algae at the surface of the water were they are most exposed and susceptible to predators.
To avoid being eaten, some tadpoles exhibit "timid" behavior, spending more time hiding than
feeding. Tadpoles exhibiting more "bold" behavior hide less and obtain more food in lakes
without fish. However, in lakes with trout, they are much more likely to be eaten by the fish
predators. Biologists hypothesize that timid behavior is an adaptation in lakes that contain non-
native trout.
Ten years after trout have been introduced into lakes, resea - ANSWER ✔✔ bold or timid
behaviors are determined by genes
Overlap of niches can be minimized through: - ANSWER ✔✔ resource partitioning
The graph right depicts population growth of organisms under contrasting assumptions. The
population growth models under both assumptions are indicated by two lines, line A and line B
(labeled in the figure). The dotted line represents the carrying capacity.
A plausible explanation of why the two lines are similar at the point indicated by the large arrow
that says "Here" on the figure would be: Select only ONE answer choice. - ANSWER ✔✔ at that
time point, the two populations are not resource limited
The graph on the right shows that the number of organisms in an isolated population over time.
In which part of the curve is the death rate and emigration rate equal to the birth rate and
immigration rate, respectively? Select only ONE answer choice. - ANSWER ✔✔ III (The top of
the parabola)
, Given the graph depicted on the right, in which region of the population growth curve is the
death rate likely exceeding the birth rate? - ANSWER ✔✔ Location C (the decreasing point on
graph)
Given the relationship demonstrated in the graph right, where is this population likely to be in
their growth curve (growth curve below, has labels A, B and C on it). - ANSWER ✔✔ Location
A (the increasing point on the graph)
You are studying a population of vultures in Ohio. While in the field, over time you observe an
increase in the degree of intraspecific competition for resources. Additionally, as time
progresses, you observe that some individuals become susceptible to certain diseases that
typically occur in populations at high densities. Lastly, during your time studying this population
you do not observe any natural disasters or major weather events in the area. Based on this
information, which line in the graph to the right best represents the patterns of growth of the
population of vultures to date? - ANSWER ✔✔ Line C (the logistic curve)
From Question 6 graph above, but ignore the prompt in question 6)
What does Line C represent in the graph in question 6? - ANSWER ✔✔ Logistic population
growth
You are working with local conservation agencies to monitor a key population of Gila monsters
living in the Sonoran Desert (pictured right). Previous studies estimate that the typical carrying
capacity of Gila monster populations is 50 individuals. You estimate the population size of Gila
monsters in this area to be 25 individuals in 2009. Based on your research, you discover that Gila
monster populations typically have a per capita growth rate of 0.25. Based on this information,
estimate the number of Gila monsters in the population in the year 2010. If your calculation has
decimals, round up if your decimal is 0.5 or larger, round down if your decimal is below 0.5.
Select only ONE answer choice. - ANSWER ✔✔ 2010=28
In the logistic growth model, if N = K, then there will be no change in population size over time.
(Note - for this question only consider the mathematical equation, not a real population) -
ANSWER ✔✔ True
You recently discovered some interesting data online while searching for information about the
population growth of various countries. You notice that the population size of a particular
country has actually decreased each year over the last 5 years. Which of the following trends
would best explain why the population size of this country has decreased each year over this 5
year time period? Choose ONE column (A-C). - ANSWER ✔✔ A: immigration decrease,
emigration increases, births decrease, deaths increase
A marine ecologist counts the numbers of octopuses in three different intertidal regions that each
measure 3 hectares. The octopus counts are 4, 8, and 6 respectively. What is the BEST estimate
of the population density (octopus/hectare) for this particular species of octopus? - ANSWER
✔✔ 6
