Bio 109 Problem Set Questions
2024/2025 Exam Questions and
Corresponding Answers with Surety of
100% Pass Mark
The growth rings that contribute to the diameter or girth of a tree are the
result of:
A. primary growth
B. apical meristems
C. secondary growth
D. Sclerenchyma - 🧠ANSWER ✔✔C. secondary growth
Some botanists argue that the entire plant should be considered as a single
unit rather than a composite of many individual cells. Which of the following
structures best supports this view?
A. the cell wall
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,B. the vacuole
C. the cell membrane
D. the plasmodesmata
E. the cytosol - 🧠ANSWER ✔✔D. the plasmodesmata
What is the main force by which most of the water within xylem vessels
moves toward the top of a tree?
A. active transport of ions into the stele
B. atmospheric pressure on roots
C. evaporation of water through stoma
D. osmosis in the root - 🧠ANSWER ✔✔C. evaporation of water through
stoma
A person working with plants may remove apical dominance by doing what
to the plant?
A. Pruning
B. deep watering the roots
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,C. Fertilizing
D. Transplanting
E. playing soft music - 🧠ANSWER ✔✔A. Pruning
Starting from the tip of a developing root in a typical angiosperm and
moving to the above-ground stem, what is the correct order of structures?
A. root cap, zone of maturation (differentiation), zone of cell division, zone
of elongation.
B. root cap, zone of cell division, zone of elongation, zone of maturation
(differentiation).
C. root cap, zone of cell division, zone of maturation (differentiation), zone
of elongation.
D. zone of cell division, root cap, zone of maturation (differentiation), zone
of elongation.
E. zone of cell division, zone of elongation, zone of maturation
(differentiation), root cap - 🧠ANSWER ✔✔B. root cap, zone of cell division,
zone of elongation, zone of maturation (differentiation).
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, Annual rings are distinct traits in plants growing in:
A. temperate regions
B. Grasslands
C. tropical regions
D. arctic regions
E. desert regions - 🧠ANSWER ✔✔A. temperate regions
Based on the ABC model, what would be the structure of a flower (in a
cross-section of the flower, from the outside to the center) that had normal
expression of genes C and B but lacked expression of gene A?
A. Carpel-petal-petal-carpel
B. Carpel-stamen-stamen-carpel
C. Sepal-petal-petal-sepal
D. Sepal-sepal-carpel-carpel
E. Carpel-stamen-carpel-stamen - 🧠ANSWER ✔✔B. Carpel-stamen-
stamen-carpel
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STATEMENT. ALL RIGHTS RESERVED
2024/2025 Exam Questions and
Corresponding Answers with Surety of
100% Pass Mark
The growth rings that contribute to the diameter or girth of a tree are the
result of:
A. primary growth
B. apical meristems
C. secondary growth
D. Sclerenchyma - 🧠ANSWER ✔✔C. secondary growth
Some botanists argue that the entire plant should be considered as a single
unit rather than a composite of many individual cells. Which of the following
structures best supports this view?
A. the cell wall
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,B. the vacuole
C. the cell membrane
D. the plasmodesmata
E. the cytosol - 🧠ANSWER ✔✔D. the plasmodesmata
What is the main force by which most of the water within xylem vessels
moves toward the top of a tree?
A. active transport of ions into the stele
B. atmospheric pressure on roots
C. evaporation of water through stoma
D. osmosis in the root - 🧠ANSWER ✔✔C. evaporation of water through
stoma
A person working with plants may remove apical dominance by doing what
to the plant?
A. Pruning
B. deep watering the roots
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STATEMENT. ALL RIGHTS RESERVED
,C. Fertilizing
D. Transplanting
E. playing soft music - 🧠ANSWER ✔✔A. Pruning
Starting from the tip of a developing root in a typical angiosperm and
moving to the above-ground stem, what is the correct order of structures?
A. root cap, zone of maturation (differentiation), zone of cell division, zone
of elongation.
B. root cap, zone of cell division, zone of elongation, zone of maturation
(differentiation).
C. root cap, zone of cell division, zone of maturation (differentiation), zone
of elongation.
D. zone of cell division, root cap, zone of maturation (differentiation), zone
of elongation.
E. zone of cell division, zone of elongation, zone of maturation
(differentiation), root cap - 🧠ANSWER ✔✔B. root cap, zone of cell division,
zone of elongation, zone of maturation (differentiation).
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, Annual rings are distinct traits in plants growing in:
A. temperate regions
B. Grasslands
C. tropical regions
D. arctic regions
E. desert regions - 🧠ANSWER ✔✔A. temperate regions
Based on the ABC model, what would be the structure of a flower (in a
cross-section of the flower, from the outside to the center) that had normal
expression of genes C and B but lacked expression of gene A?
A. Carpel-petal-petal-carpel
B. Carpel-stamen-stamen-carpel
C. Sepal-petal-petal-sepal
D. Sepal-sepal-carpel-carpel
E. Carpel-stamen-carpel-stamen - 🧠ANSWER ✔✔B. Carpel-stamen-
stamen-carpel
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STATEMENT. ALL RIGHTS RESERVED
