BIO 117 EXAM 3 | 97 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH COMPLETE
SOLUTIONS | 2026 UPDATE
Which term best describes an animal that, although generating a significant
amount of heat through metabolism, does NOT maintain a constant body
temperature? - ANSWERS Heterothermic endotherm
The velocity of blood flow is the lowest in capillaries because _____. -
ANSWERS The total cross-sectional area of the capillaries is greater than the
total cross-sectional area of the arteries or any other part of the circulatory
system
Which of the following statements comparing endotherms and ectotherms is
correct? - ANSWERS Both endotherms and ectotherms exchange heat with
the environment through convection, conduction, radiation, and evaporation.
African lungfish, which are often found in small, stagnant pools of freshwater,
produce urea as a nitrogenous waste. What is the advantage of this adaptation? -
ANSWERS Urea requires less water for excretion than ammonia.
Some animals have no gills when young, but then develop gills that grow larger as
the animal grows larger. What is the reason for this increase in gill size? -
ANSWERS Relative to their volume, the young have sufficient skin surface area
across which they can transport all the oxygen they need.
, Which of the following is a TRUE statement about body size and physiology? -
ANSWERS Small and large animals face different physiological challenges
because an animal's body volume or mass increases as a function of its body
length cubed while its surface area increases as a function of the body length
squared
You observe a lizard sitting on a log on a sunny day. If the lizard is attempting to
raise its body temperature by basking in the Sun, what mechanism of heat
transfer is being employed? - ANSWERS Radiation
In which location would you expect the oxygen concentration to be the lowest? -
ANSWERS Within tissues
The Bohr shift on the oxygen-hemoglobin dissociation curve is produced by
changes in _____. - ANSWERS pH
Chum salmon (Oncorhynchus keta) are born in freshwater environments and then
migrate to the sea. Near the end of their lives, they return to the freshwater
stream where they were born to spawn. In freshwater, water constantly diffuses
into the body and ions are lost from the body. In salt water, body water diffuses
out of the body and excess ions are gained from the water. A salmon's gills have
special cells to pump salt into or out of the body to maintain homeostasis. In
response to the salmon's moves between freshwater and salt water, some cells in
the gills are produced and others are destroyed. These changes made in the cells
of the gills during the lifetime of an individual salmon are an example of which of
the following? - ANSWERS Acclimization
Which of the following provides the best example of the adaptive relationship
between form and function? - ANSWERS Rabbit species native to hot regions
have longer limbs and ears than those native to cold regions.
DETAILED ANSWERS WITH COMPLETE
SOLUTIONS | 2026 UPDATE
Which term best describes an animal that, although generating a significant
amount of heat through metabolism, does NOT maintain a constant body
temperature? - ANSWERS Heterothermic endotherm
The velocity of blood flow is the lowest in capillaries because _____. -
ANSWERS The total cross-sectional area of the capillaries is greater than the
total cross-sectional area of the arteries or any other part of the circulatory
system
Which of the following statements comparing endotherms and ectotherms is
correct? - ANSWERS Both endotherms and ectotherms exchange heat with
the environment through convection, conduction, radiation, and evaporation.
African lungfish, which are often found in small, stagnant pools of freshwater,
produce urea as a nitrogenous waste. What is the advantage of this adaptation? -
ANSWERS Urea requires less water for excretion than ammonia.
Some animals have no gills when young, but then develop gills that grow larger as
the animal grows larger. What is the reason for this increase in gill size? -
ANSWERS Relative to their volume, the young have sufficient skin surface area
across which they can transport all the oxygen they need.
, Which of the following is a TRUE statement about body size and physiology? -
ANSWERS Small and large animals face different physiological challenges
because an animal's body volume or mass increases as a function of its body
length cubed while its surface area increases as a function of the body length
squared
You observe a lizard sitting on a log on a sunny day. If the lizard is attempting to
raise its body temperature by basking in the Sun, what mechanism of heat
transfer is being employed? - ANSWERS Radiation
In which location would you expect the oxygen concentration to be the lowest? -
ANSWERS Within tissues
The Bohr shift on the oxygen-hemoglobin dissociation curve is produced by
changes in _____. - ANSWERS pH
Chum salmon (Oncorhynchus keta) are born in freshwater environments and then
migrate to the sea. Near the end of their lives, they return to the freshwater
stream where they were born to spawn. In freshwater, water constantly diffuses
into the body and ions are lost from the body. In salt water, body water diffuses
out of the body and excess ions are gained from the water. A salmon's gills have
special cells to pump salt into or out of the body to maintain homeostasis. In
response to the salmon's moves between freshwater and salt water, some cells in
the gills are produced and others are destroyed. These changes made in the cells
of the gills during the lifetime of an individual salmon are an example of which of
the following? - ANSWERS Acclimization
Which of the following provides the best example of the adaptive relationship
between form and function? - ANSWERS Rabbit species native to hot regions
have longer limbs and ears than those native to cold regions.
