Download College Biology - Problem Drill 17: Plant Function Question No. 1 of

College Biology - Problem Drill 17: Plant Function
Question No. 1 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
1. Which of the following plant hormones is responsible for phototropism?
Question #01
(A) Ethylene
(B) Absisic acid
(C) Auxin
(D) Gibberellin
(E) Cytokinin
A. Incorrect!
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits.
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Each Answer
Choice
B. Incorrect!
Abscisic Acid is important for bud dormancy, seed maturation , abscission of leaves
and fruits and closing of stomata.
C. Correct!
Auxin is responsible for phototropism.
D. Incorrect!
Gibberellins promote stem elongation and breaks seed dormancy.
E. Incorrect!
Cytokinins stimulate cell division and promote growth of lateral buds.
Auxins:
Stimulate cell elongation
Stimulate cell division
Solution
Its effects on plants:
Apical Dominance
Phototropism
Gravitropism
Inhibit Leaf Abscission
Leaf Formation
Embryonic Development
Fruit Development
Root Initiation
Phototropism occurs when illuminated from one direction; the shoot proceeds to
grow in that direction. When illuminated, auxin accumulates on the shady side of a
plant. This stimulates elongation of cells from the shady side and bends the plant to
the light.
The correct answer is (C).
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Question No. 2 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
2. The male flower part where pollen is produced is __?
Question #02
(A) Pistil
(B) Anther
(C) Peduncle
(D) Stigma
(E) Sepal
A. Incorrect!
The pistil is the ovule producing part of a flower.
B. Correct!
The anther is the part of the stamen where pollen is produced.
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Each Answer
Choice
C. Incorrect!
The peduncle is the stalk of a flower.
D. Incorrect!
The stigma is the part of the pistil where pollen germinates.
E. Incorrect!
The sepal is the outer parts of the flower (often green and leaf-like) that encloses a
developing bud.
Peduncle: The stalk of a flower.
Receptacle: The part of a flower stalk where the parts of the flower are attached.
Sepal: The outer parts of the flower (often green and leaf-like) that enclose a
developing bud.
Petal: The parts of a flower that are often conspicuously colored.
Solution
Stamen: The pollen producing part of a flower, usually with a slender filament
supporting the anther.
Anther: The part of the stamen where pollen is produced.
Pistil: The ovule producing part of a flower. The ovary often supports a long style,
topped by a stigma. The mature ovary is a fruit, and the mature ovule is a seed.
Stigma: The part of the pistil where pollen germinates.
Ovary: The enlarged basal portion of the pistil where ovules are produced
The correct answer is (B).
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Question No. 3 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
3. Which of the following elements is not a macronutrient for plants?
Question #03
(A) Phosphorus
(B) Nitrogen
(C) Potassium
(D) Oxygen
(E) Chloride
A. Incorrect!
Phosphorus is a macronutrient.
B. Incorrect!
Nitrogen is a macronutrient.
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Choice
C. Incorrect!
Potassium is a macronutrient.
D. Incorrect!
Oxygen is a macronutrient.
E. Correct!
Chloride is a micronutrient not a macronutrient.
Macronutrients: 9 elements required in large quantity that plants absorb from air
and soil to support their growth. These include C, H, O, N, P, K, Ca, Mg and S.
Micronutrients: 7 elements required in small quantities that plants absorb from air
and soil. These include boron, copper, iron, chloride, manganese, molybdenum, and
zinc.
The correct answer is (E).
Solution
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Question No. 4 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
4. Which of the following phenomena is NOT caused by auxin?
Question #04
(A) Gravitropism
(B) Apical dominance
(C) Leaf abscission
(D) Root initiation
(E) None of the above
A. Incorrect!
Gravitropism is caused by auxin.
B. Incorrect!
Apical dominance is caused by auxin.
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Each Answer
Choice
C. Incorrect!
Leaf abscission is caused by auxin.
D. Incorrect!
Root initiation is caused by auxin.
E. Correct!
All of these are caused by auxin. So this is the correct answer.
Auxins:
Stimulate cell elongation
Stimulate cell division
Solution
Effects on plants:
Apical Dominance
Phototropism
Gravitropism
Inhibit Leaf Abscission
Leaf Formation
Embryonic Development
Fruit Development
Root Initiation
The correct answer is (E).
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Question No. 5 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
5. The signal molecule that is produced in response to a wound is ____?
Question #05
(A) Ethylene
(B) Systemin
(C) Gibberellins
(D) Alkaloids
(E) None of the above
A. Incorrect!
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits.
B. Correct!
Systemin is produced in response to wound injury.
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Each Answer
Choice
C. Incorrect!
Gibberellin promotes stem elongation and breaks seed dormancy.
D. Incorrect!
Alkaloids serve as chemical barrier for plant defense.
E. Incorrect!
The answer is found in the choices listed here so this cannot be the right choice.
Auxins stimulate cell elongation and cell division.
Cytokinins stimulate cell division and Promote growth of lateral buds.
Gibberellins promote stem elongation and breaks seed dormancy.
Abscisic Acid is important for bud dormancy and seed maturation and
dormancy,abscission of leaves and fruits and closing of stomata.
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits.
Solution
Systemin is a signal molecule for plants to sense the wound and triggers a series of
biochemical reaction to release proteinase inhibitors, which are toxic to insects.
Natural Physical barrier include the following:
Cuticle: a layer of wax on surface of leaves
Trichomes: extension of plant cells
Spines (modified leaves)
Bark
Natural Chemical barriers include the following:
Isoprene
Phenolic compounds
Alkaloids
The correct answer is (B).
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Question No. 6 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
6. What is the evaporation of excess water from aerial parts of a plant known as?
Question #06
(A) Transpiration
(B) Desiccation
(C) Photosynthesis
(D) Phototropism
(E) None of the above
A. Correct!
Transpiration is the evaporation of water from the plant.
B. Incorrect!
Desiccation is the removal of water.
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Each Answer
Choice
C. Incorrect!
Photosynthesis is the process of converting chemical energy from light energy.
D. Incorrect!
Phototropism is the growth of a plant toward the light source.
E. Incorrect!
There is one choice that is correct so this cannot be the right answer.
Transpiration is the evaporation of excess water from aerial parts of a plant, from
leaves, stems, flowers and fruits. Root absorbs minerals and water from soil.
- Water and solute are transported up through plants via xylem.
- The driving force is the evaporation from leaves via guard cells
- This process (evaporation of leaves via guard cells pulls up water from root)
is called transpiration.
The correct answer is (A).
Solution
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Question No. 7 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
7. What is the inhibition of the lateral bud by auxin from the apical bud, known as?
Question #07
(A) Phototropism
(B) Apical dominance
(C) Gravitropism
(D) Transpiration
(E) None of the above
A. Incorrect!
Phototropism is the ability of the plant to grow toward the light source.
B. Correct!
Apical dominance is the inhibition of lateral buds by auxin from the apical bud.
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Each Answer
Choice
C. Incorrect!
Plant growth and its movements respond to gravity. This is known as gravitropism.
D. Incorrect!
Transpiration is the evaporation of excess water from aerial parts of a plant.
E. Incorrect!
The correct choice is listed here so this cannot be the right answer.
Apical dominance is the inhibition of lateral buds by auxin from the apical bud.
- Auxin is broken down as it moves down stem, so its concentration
decreases.
- Removal of apical bud releases apical dominance.
The correct answer is (B).
Solution
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Question No. 8 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
8. Which molecule stimulates stem elongation?
Question #08
(A) Auxin
(B) Cytokinin
(C) Gibberellins
(D) Abscisic acid
(E) Ethylene
A. Incorrect!
Auxin stimulates cell elongation and stimulates cell division.
B. Incorrect!
Cytokinins stimulate cell division and promote growth of lateral buds.
Feedback on
Each Answer
Choice
C. Correct!
Gibberellins promote stem elongation and break seed dormancy.
D. Incorrect!
Abscicis acid is important for bud dormancy and seed maturation and dormancy,
abscission of leaves and fruits and closing of stomata.
E. Incorrect!
Ethylene promotes fruit ripening and stimulates senescence and abscission in leaves
and fruits.
Auxins stimulate cell elongation and cell division.
• Cytokinins stimulate cell division and Promote growth of lateral buds.
• Gibberellins promote stem elongation and breaks seed dormancy.
Abscisic Acid is important for bud dormancy and seed maturation and
dormancy,abscission of leaves and fruits and closing of stomata.
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits.
Systemin is a signal molecule for plants to sense the wound and triggers a series of
biochemical reaction to release proteinase inhibitors, which are toxic to insects.
Solution
Natural Physical barrier include the following:
• Cuticle: a layer of wax on surface of leaves
• Trichomes: extension of plant cells
• Spines (modified leaves)
• Bark
Natural Chemical barriers include the following:
• Isoprene
• Phenolic compounds
• Alkaloids
The correct answer is (C).
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Question No. 9 of 10
Instructions: (1) Read the problem statement and answer choices carefully; (2) Work the problems
on paper as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
9. Which molecule is important for dealing with plant stress?
(A) Cytokinin
(B) Auxin
(C) Gibberellin
(D) Abscisic acid
(E) Ethylene
Question #09
A. Incorrect!
Cytokinins stimulate cell division and promote growth of lateral buds.
B. Incorrect!
Auxins stimulate cell elongation and Stimulate cell division.
Feedback on
Each Answer
Choice
C. Incorrect!
Gibberellins promote stem elongation and break seed dormancy.
D. Correct!
Abscisic acid is a major plant stress hormone.
E. Incorrect!
Ethylene promotes fruit ripening and stimulates senescence and abscission in leaves
and fruits.
Auxins stimulate cell elongation and cell division
•
•
Cytokinins stimulate cell division and Promote growth of lateral buds.
Gibberellins promote stem elongation and breaks seed dormancy.
Abscisic Acid is important for bud dormancy and seed maturation and
dormancy,abscission of leaves and fruits and closing of stomata. It is the primary
stress hormone.
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits
Solution
Systemin is a signal molecule for plants to sense the wound and triggers a series of
biochemical reaction to release proteinase inhibitors, which are toxic to insects.
Natural Physical barrier include the following:
• Cuticle: a layer of wax on surface of leaves
• Trichomes: extension of plant cells
• Spines (modified leaves)
• Bark
Natural Chemical barriers include the following:
• Isoprene
• Phenolic compounds
• Alkaloids
The correct answer is (D).
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Question No. 10 of 10
Instructions: (1) Read the problem and answer choices carefully; (2) Work the problems on paper
as needed; (3) Pick the answer; (4) Go back to review the core concept tutorial as needed.
10. Which molecule is important for promoting lateral bud growth?
(A) Auxin
(B) Systemin
(C) Gibberellins
(D) Ethylene
(E) None of the above
Question #10
A. Incorrect!
Auxin stimulates cell elongation and stimulates cell division.
B. Incorrect!
Systemin is a signal molecule for plants to sense the wound and triggers a series of
biochemical reaction to release proteinase inhibitors, which are toxic to insects.
Feedback on
Each Answer
Choice
C. Incorrect!
Gibberllins promote stem elongation and break seed dormancy.
D. Incorrect!
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits.
E. Correct!
The correct answer is cytokinin and it is not listed here. This is the correct choice.
Auxins stimulate cell elongation and cell division.
•
•
Cytokinins stimulate cell division and promote growth of lateral buds.
Gibberellins promote stem elongation and breaks seed dormancy.
Abscisic Acid is important for bud dormancy and seed maturation and
dormancy,abscission of leaves and fruits and closing of stomata
Ethylene promotes fruit ripening and stimulates senescence and abscission in
leaves and fruits
Systemin is a signal molecule for plants to sense the wound and triggers a series of
biochemical reaction to release proteinase inhibitors, which are toxic to insects.
Solution
Natural Physical barrier include the following:
• Cuticle: a layer of wax on surface of leaves
• Trichomes: extension of plant cells
• Spines (modified leaves)
• Bark
Natural Chemical barriers include the following:
• Isoprene
• Phenolic compounds
• Alkaloids
The correct answer is (E).
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