Bio 109 Problem Set Questions with
Correct Answers 100% Pass
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 - ✔✔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
B. the vacuole
C. the cell membrane
D. the plasmodesmata
E. the cytosol - ✔✔D. the plasmodesmata
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,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 - ✔✔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
C. Fertilizing
D. Transplanting
E. playing soft music - ✔✔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).
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, 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
- ✔✔B. root cap, zone of cell division, zone of elongation, zone of maturation
(differentiation).
Annual rings are distinct traits in plants growing in:
A. temperate regions
B. Grasslands
C. tropical regions
D. arctic regions
E. desert regions - ✔✔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
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Correct Answers 100% Pass
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 - ✔✔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
B. the vacuole
C. the cell membrane
D. the plasmodesmata
E. the cytosol - ✔✔D. the plasmodesmata
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
,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 - ✔✔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
C. Fertilizing
D. Transplanting
E. playing soft music - ✔✔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).
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
, 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
- ✔✔B. root cap, zone of cell division, zone of elongation, zone of maturation
(differentiation).
Annual rings are distinct traits in plants growing in:
A. temperate regions
B. Grasslands
C. tropical regions
D. arctic regions
E. desert regions - ✔✔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
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 3
