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Control and Coordination MCQs for Class 10 Exam
It covers all Important Questions with answers on Control and Coordination for the Class 10 exam. The questions are based on important topics. Details about the questions:- Topic: Control and Coordination
- Type of Questions: MCQs with solutions
- Number of Questions: 4
- You can attempt them on EduRev to score high in Class 10 exam.
Mark the odd one out:- a)Auxin
- b)Abscisic acid
- c)Cytokinin
- d)Gibberellins
Correct answer is option 'B'. Can you explain this answer?
Mark the odd one out:
a)
Auxin
b)
Abscisic acid
c)
Cytokinin
d)
Gibberellins
| | Harshit Agrawal answered |
Correct option is B as auxin , cytokinin and gibberellins are growth promoting plant hormones while Abscisic acid is the growth inhibitior plant hormone.
Match the following-
Column I Column II
1. Hormones i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth- a)1 – iv; 2 – v; 3 – ii; 4 – iii; 5 – i
- b)1 – v; 2 – iv; 3 – ii; 4 – iii; 5 – i
- c)1- iv; 2 – iii; 3 – iv; 4 – ii; 5 – i
- d)1 – iv; 2 – v; 3 – iii; 4 – ii; 5 – i
Correct answer is option 'A'. Can you explain this answer?
Match the following-
Column I Column II
1. Hormones i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth
Column I Column II
1. Hormones i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth
a)
1 – iv; 2 – v; 3 – ii; 4 – iii; 5 – i
b)
1 – v; 2 – iv; 3 – ii; 4 – iii; 5 – i
c)
1- iv; 2 – iii; 3 – iv; 4 – ii; 5 – i
d)
1 – iv; 2 – v; 3 – iii; 4 – ii; 5 – i
 | Amit Sharma answered |
Hormones synthesized at places away from where they act. Growth is seedling germination. Chemotropic is the growth of pollen tubes towards ovules. Root is positively geotrophic. Shoot is positively phototropic.
Mark the odd one out:- a)Auxin
- b)Abscisic acid
- c)Cytokinin
- d)Gibberellins
Correct answer is option 'B'. Can you explain this answer?
Mark the odd one out:
a)
Auxin
b)
Abscisic acid
c)
Cytokinin
d)
Gibberellins
 | Keerthana Rane answered |
Auxin, cytokinin and gibberellins are growth promoting plant hormones while Abscisic acid is the growth inhibitior plant hormone.
What is the primary function of Gibberellin in plants?- a)Inhibiting growth
- b)Promoting cell division
- c)Stimulating root growth
- d)Assisting stem growth
Correct answer is option 'D'. Can you explain this answer??
a)
Inhibiting growth
b)
Promoting cell division
c)
Stimulating root growth
d)
Assisting stem growth
 | Arjun Singh answered |
Understanding Gibberellin
Gibberellins are a group of plant hormones that play a crucial role in various growth processes. Their primary function is significantly related to stem growth.
Key Functions of Gibberellins:
- Stimulating Stem Elongation: Gibberellins promote cell elongation, particularly in stems, leading to increased height and overall growth of the plant. This process is essential for plants to reach light and optimize photosynthesis.
- Promoting Cell Division: While gibberellins do influence cell division, their primary role centers on elongation rather than dividing cells. This is why their effect is more pronounced in stems.
- Enhancing Germination: Gibberellins play a pivotal role in seed germination. They break dormancy and initiate the growth process by stimulating enzymes that mobilize stored food in seeds.
- Influencing Flowering: Some gibberellins can also affect flowering processes, particularly in certain plants that require specific conditions to bloom.
In Summary:
Gibberellins are primarily involved in:
- Promoting stem growth and elongation, allowing plants to achieve greater heights.
- Supporting other growth processes, but their most notable function is in enhancing stem development.
Thus, option 'D'—assisting stem growth—accurately describes the primary function of gibberellins in plants, distinguishing them from other growth hormones that may inhibit growth or focus on root development.
Gibberellins are a group of plant hormones that play a crucial role in various growth processes. Their primary function is significantly related to stem growth.
Key Functions of Gibberellins:
- Stimulating Stem Elongation: Gibberellins promote cell elongation, particularly in stems, leading to increased height and overall growth of the plant. This process is essential for plants to reach light and optimize photosynthesis.
- Promoting Cell Division: While gibberellins do influence cell division, their primary role centers on elongation rather than dividing cells. This is why their effect is more pronounced in stems.
- Enhancing Germination: Gibberellins play a pivotal role in seed germination. They break dormancy and initiate the growth process by stimulating enzymes that mobilize stored food in seeds.
- Influencing Flowering: Some gibberellins can also affect flowering processes, particularly in certain plants that require specific conditions to bloom.
In Summary:
Gibberellins are primarily involved in:
- Promoting stem growth and elongation, allowing plants to achieve greater heights.
- Supporting other growth processes, but their most notable function is in enhancing stem development.
Thus, option 'D'—assisting stem growth—accurately describes the primary function of gibberellins in plants, distinguishing them from other growth hormones that may inhibit growth or focus on root development.
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