ASU BIO 182 EXAM 3 QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS
100% CORRECT | NEW UPDATE 2025
Which group is not a population? - ANSWERS all four groups are populations
How would you estimate the number of whales in a population? - ANSWERS
mark and recapture
What is a population? - ANSWERS a group of individuals of the same species
living in the same area at the same time
True or False? Sampling quadrats would be the better method for estimating the
number of whales in a population. - ANSWERS false
True or False? Mark and recapture would be the better method for estimating the
number of saguaros in a population. - ANSWERS true
True or False? The shrinking population between 1965 and 1970 could have
resulted from a decrease in the birth rate or an increase in the death rate. -
ANSWERS true
True or False? The growing population between 1985 and 1995 could have
resulted from a decrease in emigration or an increase in immigration. -
ANSWERS true
,The human population has grown ____________________ - ANSWERS
exponentially
The growth of a population depends on __________________ - ANSWERS the
birth rate minus the death rate.
A population stops growing when it _____________________ - ANSWERS
reaches its carrying capacity.
True or False? The carrying capacity of a population depends on the resources
available in the environment. - ANSWERS true
Why do bluegills nest on the edge of the lake? - ANSWERS The habitat in the
shallow water might receive more solar radiation, holds more zooplankton (which
is what they eat), more protective over young than it in deeper water where larger
fish reside, more algae for the fish to hide in, warmer water for embryos to
develop quickly and enhance survival/fitness.
Activity: Write a Figure Legend - ANSWERS Bluegills prefer certain water temp;
when given a choice between 27 degrees celsius and 31 degrees celsius, bluegills
spent a majority of their time at 31 degrees celsius.
True or False? If males compete for space, a large male will likely force a small
male to spend less time on the side of the tank with the optimal temperature. -
ANSWERS true
, True or False? Both models assume that no individuals immigrate into the
population. - ANSWERS false
t/f: When possible, a bluegill prefers to have a body temperature around 31°C. -
ANSWERS true
T/F: When competing with an adult, a juvenile bluegill will always have a lower
body temperature than its preferred temperature. - ANSWERS False (If the
environment hotter than preferred, on average, large bluegill will force small
bluegills to remain in parts of water that are hotter than preferred)
T/F: All else being equal, the carrying capacity of a lake would likely increase as
more parts of the lake warm to 31°C. - ANSWERS true
T/F: All else being equal, a juvenile bluegill will likely grow slower in a lake with
many adult bluegills than in a lake with few adults - ANSWERS true
T/F: The growth of a bluegill population would be better described by a model
without density dependence than by a model with density dependence. -
ANSWERS false, Because access to suitable temperatures is limited, the
growth of the population will have a carrying capacity, which requires density
dependence
T/F: The number of whales was more likely estimated by sampling than by mark-
recapture. - ANSWERS false
T/F: The shrinking population between 1965 and 1970 could have resulted from a
decrease in the birth rate or an increase in the death rate. - ANSWERS true
ANSWERS WITH COMPLETE SOLUTIONS
100% CORRECT | NEW UPDATE 2025
Which group is not a population? - ANSWERS all four groups are populations
How would you estimate the number of whales in a population? - ANSWERS
mark and recapture
What is a population? - ANSWERS a group of individuals of the same species
living in the same area at the same time
True or False? Sampling quadrats would be the better method for estimating the
number of whales in a population. - ANSWERS false
True or False? Mark and recapture would be the better method for estimating the
number of saguaros in a population. - ANSWERS true
True or False? The shrinking population between 1965 and 1970 could have
resulted from a decrease in the birth rate or an increase in the death rate. -
ANSWERS true
True or False? The growing population between 1985 and 1995 could have
resulted from a decrease in emigration or an increase in immigration. -
ANSWERS true
,The human population has grown ____________________ - ANSWERS
exponentially
The growth of a population depends on __________________ - ANSWERS the
birth rate minus the death rate.
A population stops growing when it _____________________ - ANSWERS
reaches its carrying capacity.
True or False? The carrying capacity of a population depends on the resources
available in the environment. - ANSWERS true
Why do bluegills nest on the edge of the lake? - ANSWERS The habitat in the
shallow water might receive more solar radiation, holds more zooplankton (which
is what they eat), more protective over young than it in deeper water where larger
fish reside, more algae for the fish to hide in, warmer water for embryos to
develop quickly and enhance survival/fitness.
Activity: Write a Figure Legend - ANSWERS Bluegills prefer certain water temp;
when given a choice between 27 degrees celsius and 31 degrees celsius, bluegills
spent a majority of their time at 31 degrees celsius.
True or False? If males compete for space, a large male will likely force a small
male to spend less time on the side of the tank with the optimal temperature. -
ANSWERS true
, True or False? Both models assume that no individuals immigrate into the
population. - ANSWERS false
t/f: When possible, a bluegill prefers to have a body temperature around 31°C. -
ANSWERS true
T/F: When competing with an adult, a juvenile bluegill will always have a lower
body temperature than its preferred temperature. - ANSWERS False (If the
environment hotter than preferred, on average, large bluegill will force small
bluegills to remain in parts of water that are hotter than preferred)
T/F: All else being equal, the carrying capacity of a lake would likely increase as
more parts of the lake warm to 31°C. - ANSWERS true
T/F: All else being equal, a juvenile bluegill will likely grow slower in a lake with
many adult bluegills than in a lake with few adults - ANSWERS true
T/F: The growth of a bluegill population would be better described by a model
without density dependence than by a model with density dependence. -
ANSWERS false, Because access to suitable temperatures is limited, the
growth of the population will have a carrying capacity, which requires density
dependence
T/F: The number of whales was more likely estimated by sampling than by mark-
recapture. - ANSWERS false
T/F: The shrinking population between 1965 and 1970 could have resulted from a
decrease in the birth rate or an increase in the death rate. - ANSWERS true
