Bio 116 Exam 2 Test Questions with
Guaranteed Pass Solutions 2025-2026
Updated.
Identify which of the following is TRUE regarding the xylem
a. transports the products of photosynthesis
b. fluid movement explained by cohesion-tension theory
c. flow rate regulated by ABA (abscisic acid) concentration
d. transports fluids from stem to root - Answer b
you have discovered a new plant species that does not exhibit phototropism. it also has
abnormally large cells in some organs. you suspect this species is unable to produce a specific
hormone. hypothesize which hormone is most likely absent
a. auxin
b. ethylene
c. abscisic acid
d. cytokinin - Answer a
compare and contrast plant systems. which statements CORRECTLY describe the normal
movement of materials through a plant
1. water transport is bidirectional
2. water enters the plant at the stomata
3. sugar transport occurs via positive pressure
4. sugar is loaded into the phloem at a source - Answer 3 and 4
identify which of the following is a function of the root system
a. store starch
b. attract pollinators
c. photosynthesis
d. support leaves - Answer a
identify which of the following are components of the triple response that is triggered by
ethylene
1. thicken stem
2. grow towards light
3. slow elongation
, 4. increase root growth
5. grow horizontally - Answer 1, 3 and 5
an insect has landed on the stem of a non-woody plant. it has not entered the plant, but it has
caused damage. hypothesize which of the following parts of the plant is most likely damaged
a. phloem
b. periderm
c. cuticle
d. xylem - Answer c
sequence the path of a water molecule through a plant, starting from the soil
1. stomata
2. stem xylem
3. root tissue
4. atmosphere - Answer 3 -> 2 -> 1 -> 4
which of the following is/are true regarding homeostasis
1. conformers maintain conditions at a set point or within a normal range
2. it is the steady state of physiological condition in the body
3. all animals are thermoregulators - Answer 2 only
honeybees require a specific temperature in the hive to maintain a healthy colony. some bees
are heater bees whose function is to generate heat to maintain the optimal temperature. if the
temperature of the hive is too low, then the heater bees move muscles which increase their
body temperature. This then brings the hives to its optimal temperature. hypothesize which of
the following occur(s) in these hives
1. heater bees continue to increase body temperature once the optimum is achieved
2. this is an example of positive feedback; increased hive temperature will lead to increased
heater bee activity
3. this is an example of negative feedback; heater bees will not move their muscles when hive
temperature is too high - Answer 3 only
which of the following is/are an adaptation(s) found in animals to promote exchange with the
environment
1. folded exchange surfaces
2. stomata
3. cuticle - Answer 1 only
Guaranteed Pass Solutions 2025-2026
Updated.
Identify which of the following is TRUE regarding the xylem
a. transports the products of photosynthesis
b. fluid movement explained by cohesion-tension theory
c. flow rate regulated by ABA (abscisic acid) concentration
d. transports fluids from stem to root - Answer b
you have discovered a new plant species that does not exhibit phototropism. it also has
abnormally large cells in some organs. you suspect this species is unable to produce a specific
hormone. hypothesize which hormone is most likely absent
a. auxin
b. ethylene
c. abscisic acid
d. cytokinin - Answer a
compare and contrast plant systems. which statements CORRECTLY describe the normal
movement of materials through a plant
1. water transport is bidirectional
2. water enters the plant at the stomata
3. sugar transport occurs via positive pressure
4. sugar is loaded into the phloem at a source - Answer 3 and 4
identify which of the following is a function of the root system
a. store starch
b. attract pollinators
c. photosynthesis
d. support leaves - Answer a
identify which of the following are components of the triple response that is triggered by
ethylene
1. thicken stem
2. grow towards light
3. slow elongation
, 4. increase root growth
5. grow horizontally - Answer 1, 3 and 5
an insect has landed on the stem of a non-woody plant. it has not entered the plant, but it has
caused damage. hypothesize which of the following parts of the plant is most likely damaged
a. phloem
b. periderm
c. cuticle
d. xylem - Answer c
sequence the path of a water molecule through a plant, starting from the soil
1. stomata
2. stem xylem
3. root tissue
4. atmosphere - Answer 3 -> 2 -> 1 -> 4
which of the following is/are true regarding homeostasis
1. conformers maintain conditions at a set point or within a normal range
2. it is the steady state of physiological condition in the body
3. all animals are thermoregulators - Answer 2 only
honeybees require a specific temperature in the hive to maintain a healthy colony. some bees
are heater bees whose function is to generate heat to maintain the optimal temperature. if the
temperature of the hive is too low, then the heater bees move muscles which increase their
body temperature. This then brings the hives to its optimal temperature. hypothesize which of
the following occur(s) in these hives
1. heater bees continue to increase body temperature once the optimum is achieved
2. this is an example of positive feedback; increased hive temperature will lead to increased
heater bee activity
3. this is an example of negative feedback; heater bees will not move their muscles when hive
temperature is too high - Answer 3 only
which of the following is/are an adaptation(s) found in animals to promote exchange with the
environment
1. folded exchange surfaces
2. stomata
3. cuticle - Answer 1 only
