BIOL 1108 Final Exam – Principles of
Biology II (Latest 2026/ 2027 Update)
Review | 100% Verified Questions &
Answers
A woman is growing an African violet on her windowsill. After several weeks, she
notices that the plant is leaning toward the right, in the direction of the window. In the
stem(s) of her African violet, where would you expect to find the most auxin?
A. on the left (shaded) sides of the stems, facing away from the window
B. on the right (lit) sides of the stems, facing toward the window
C. Auxin will be equally distributed between the right and left sides of the stems.
D. Gibberellin acid - not auxin - will be in the stems of the African violet -
CORRECTANSWER A. on the left (shaded) sides of the stems, facing away from the
window
In your vegetable garden you a growing yams. Yams are modified root tissue from the
plant. What is the function of the yam for the plant?
A. It stores water for the plant in times of drought.
B. It stores sugar for the plant.
C. It provides greater surface area for water absorption.
D. It provides greater surface area for the growth of additional root meristems. -
CORRECTANSWER B. It stores sugar for the plant.
,You purchase two identical houseplants and place them side by side on your windowsill.
You water both plants equally. One plant, plant a, you leave alone. On the other plant,
plant b, you pinch off the top of the growing stem, effectively removing the apical
meristem. Which of the following would you expect to occur?
A. Both plants will look exactly the same except that plant b will be shorter.
B. Plant a will be much bushier, with growth of many lateral branches.
C. Plant b will have larger leaves to make up for the loss in photosynthetic tissues from
reduced growth.
D. Plant b will be much bushier, with growth of many lateral branches.
E. The level of auxin in plant b will be higher than in plant a. -CORRECTANSWER D.
Plant b will be much bushier, with growth of many lateral branches.
What is an advantage of root meristems originating at the pericycle, rather than at the
other root structures (e.g., the epidermis)?
A. New roots form only at the tips of pre-existing roots, reaching deep-water sources
B. New roots are directly connected to the xylem and phloem of pre-existing roots.
C. New roots form outside the Casparian strip and can absorb more nutrients.
D. New roots will only sprout from on pre-existing roots. -CORRECTANSWER B. New
roots are directly connected to the xylem and phloem of pre-existing roots.
Vascular cambium is one of two lateral meristems, the other being cork cambium. A
plant grow sin diameter primarily through divisions of the vascular cambium. If you pull a
,small piece of bark off a tree, and then look at its inside surface, what tissue are you
looking at (ignore any remaining cells of vascular cambium that may be left)?
A. cork cambium
B. cork
C. xylem
D. phloem -CORRECTANSWER D. phloem
Imagine you are a molecule of water in the rhizosphere of an oak tree. You enter the
root and follow a path all the way to a stomata of a leaf and transpire out of the leaf. For
all of this, you only enter a single living cell. What is that cell? -CORRECTANSWER
Tracheid cell
A researcher comes across a plant that has been infected by a pathogen. As a result of
the infection, the plant has undergone a systemic acquired resistance (SAR) response
and has also generated several siRNAs. Based on this response, what type of pathogen
most likely infected the plant?
A. a bacterium
b. a virus
c. a fungi
d. an oomycete
e. a parasitic plant -CORRECTANSWER B. a virus
, You may have heard that monarch butterflies (and their caterpillars) are "poisonous" to
many predators. What makes these insects so toxic? Read your CORRECTANSWER
choices carefully!
a. Monarch caterpillars produce cardenolides in their digestive tracts.
b. Monarch caterpillars use cardenolides from milkweed to synthesize toxin.
c. Monarch caterpillars ingest milkweed latex which "chokes" their predators.
d. Monarch caterpillars store cardenolides from milkweeds.
e. Monarch caterpillars secrete latex from their bodies. -CORRECTANSWER d.
Monarch caterpillars store cardenolides from milkweeds.
Recall that the bullhorn acacia forms a symbiosis with P. ferruginea ants. A researcher
takes an acacia seed and plants it in an area without P. ferruginea. What will happen to
this acacia plant?
a. It will immediately form a symbiotic relationship with ants native to the area.
b. It will begin producing alkaloids and terpenes to deter herbivores.
c. It will begin to produce hairs on its leaves to deter herbivores.
d. Without P. ferruginea, the plant won't have any defenses and will be eaten by
herbivores. -CORRECTANSWER d. Without P. ferruginea, the plant won't have any
defenses and will be eaten by herbivores.
A seed from a yew tree germinates on the forest floor. During the first few months of its
life, the sapling dedicates most of its resources to increasing in height rather than
Biology II (Latest 2026/ 2027 Update)
Review | 100% Verified Questions &
Answers
A woman is growing an African violet on her windowsill. After several weeks, she
notices that the plant is leaning toward the right, in the direction of the window. In the
stem(s) of her African violet, where would you expect to find the most auxin?
A. on the left (shaded) sides of the stems, facing away from the window
B. on the right (lit) sides of the stems, facing toward the window
C. Auxin will be equally distributed between the right and left sides of the stems.
D. Gibberellin acid - not auxin - will be in the stems of the African violet -
CORRECTANSWER A. on the left (shaded) sides of the stems, facing away from the
window
In your vegetable garden you a growing yams. Yams are modified root tissue from the
plant. What is the function of the yam for the plant?
A. It stores water for the plant in times of drought.
B. It stores sugar for the plant.
C. It provides greater surface area for water absorption.
D. It provides greater surface area for the growth of additional root meristems. -
CORRECTANSWER B. It stores sugar for the plant.
,You purchase two identical houseplants and place them side by side on your windowsill.
You water both plants equally. One plant, plant a, you leave alone. On the other plant,
plant b, you pinch off the top of the growing stem, effectively removing the apical
meristem. Which of the following would you expect to occur?
A. Both plants will look exactly the same except that plant b will be shorter.
B. Plant a will be much bushier, with growth of many lateral branches.
C. Plant b will have larger leaves to make up for the loss in photosynthetic tissues from
reduced growth.
D. Plant b will be much bushier, with growth of many lateral branches.
E. The level of auxin in plant b will be higher than in plant a. -CORRECTANSWER D.
Plant b will be much bushier, with growth of many lateral branches.
What is an advantage of root meristems originating at the pericycle, rather than at the
other root structures (e.g., the epidermis)?
A. New roots form only at the tips of pre-existing roots, reaching deep-water sources
B. New roots are directly connected to the xylem and phloem of pre-existing roots.
C. New roots form outside the Casparian strip and can absorb more nutrients.
D. New roots will only sprout from on pre-existing roots. -CORRECTANSWER B. New
roots are directly connected to the xylem and phloem of pre-existing roots.
Vascular cambium is one of two lateral meristems, the other being cork cambium. A
plant grow sin diameter primarily through divisions of the vascular cambium. If you pull a
,small piece of bark off a tree, and then look at its inside surface, what tissue are you
looking at (ignore any remaining cells of vascular cambium that may be left)?
A. cork cambium
B. cork
C. xylem
D. phloem -CORRECTANSWER D. phloem
Imagine you are a molecule of water in the rhizosphere of an oak tree. You enter the
root and follow a path all the way to a stomata of a leaf and transpire out of the leaf. For
all of this, you only enter a single living cell. What is that cell? -CORRECTANSWER
Tracheid cell
A researcher comes across a plant that has been infected by a pathogen. As a result of
the infection, the plant has undergone a systemic acquired resistance (SAR) response
and has also generated several siRNAs. Based on this response, what type of pathogen
most likely infected the plant?
A. a bacterium
b. a virus
c. a fungi
d. an oomycete
e. a parasitic plant -CORRECTANSWER B. a virus
, You may have heard that monarch butterflies (and their caterpillars) are "poisonous" to
many predators. What makes these insects so toxic? Read your CORRECTANSWER
choices carefully!
a. Monarch caterpillars produce cardenolides in their digestive tracts.
b. Monarch caterpillars use cardenolides from milkweed to synthesize toxin.
c. Monarch caterpillars ingest milkweed latex which "chokes" their predators.
d. Monarch caterpillars store cardenolides from milkweeds.
e. Monarch caterpillars secrete latex from their bodies. -CORRECTANSWER d.
Monarch caterpillars store cardenolides from milkweeds.
Recall that the bullhorn acacia forms a symbiosis with P. ferruginea ants. A researcher
takes an acacia seed and plants it in an area without P. ferruginea. What will happen to
this acacia plant?
a. It will immediately form a symbiotic relationship with ants native to the area.
b. It will begin producing alkaloids and terpenes to deter herbivores.
c. It will begin to produce hairs on its leaves to deter herbivores.
d. Without P. ferruginea, the plant won't have any defenses and will be eaten by
herbivores. -CORRECTANSWER d. Without P. ferruginea, the plant won't have any
defenses and will be eaten by herbivores.
A seed from a yew tree germinates on the forest floor. During the first few months of its
life, the sapling dedicates most of its resources to increasing in height rather than
