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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Lateral meristems add thickness of plants.
Reason : Lateral meristems divide only in one plane.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Direction: In the following questions, a statement of assertion (A) i...
Lateral meristems are present along the side of the stem. Vascular cambium in the gymnosperms and the angiosperms is a good example of lateral meristems. Lateral meristem is always composed of a single layer of rectangular cells that divide only in one plane and produce new vascular tissues on either side.
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Direction: In the following questions, a statement of assertion (A) i...
Assertion : Lateral meristems add thickness of plants.
Reason : Lateral meristems divide only in one plane.
Explanation:
Lateral meristems are a type of meristem found in the lateral regions of plants, such as the cambium. Meristems are regions of actively dividing cells that contribute to the growth of plants. The two main types of meristems are apical meristems and lateral meristems.
1. Lateral meristems add thickness of plants:
- The main function of lateral meristems is to add thickness or girth to the plant. They are responsible for the secondary growth of plants, which leads to an increase in the width or diameter of the plant.
- Lateral meristems produce new cells in a radial pattern, adding layers of cells to the plant's stem or root. This results in the overall increase in thickness of the plant.
2. Lateral meristems divide only in one plane:
- The reason provided in the statement is incorrect. Lateral meristems, such as the cambium, actually divide in two planes: the radial plane (perpendicular to the stem or root) and the tangential plane (parallel to the stem or root).
- The radial division of cells adds new cells to the inner side of the stem or root, while the tangential division adds new cells to the outer side.
- This dual-plane division allows for the increase in girth and thickness of the plant.
In conclusion, both the assertion and the reason are true, but the reason does not correctly explain the assertion. Lateral meristems do add thickness to plants, but they divide in two planes, not just one. Therefore, the correct answer is option 'B': Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Reason : Lateral meristems divide only in one plane.
Explanation:
Lateral meristems are a type of meristem found in the lateral regions of plants, such as the cambium. Meristems are regions of actively dividing cells that contribute to the growth of plants. The two main types of meristems are apical meristems and lateral meristems.
1. Lateral meristems add thickness of plants:
- The main function of lateral meristems is to add thickness or girth to the plant. They are responsible for the secondary growth of plants, which leads to an increase in the width or diameter of the plant.
- Lateral meristems produce new cells in a radial pattern, adding layers of cells to the plant's stem or root. This results in the overall increase in thickness of the plant.
2. Lateral meristems divide only in one plane:
- The reason provided in the statement is incorrect. Lateral meristems, such as the cambium, actually divide in two planes: the radial plane (perpendicular to the stem or root) and the tangential plane (parallel to the stem or root).
- The radial division of cells adds new cells to the inner side of the stem or root, while the tangential division adds new cells to the outer side.
- This dual-plane division allows for the increase in girth and thickness of the plant.
In conclusion, both the assertion and the reason are true, but the reason does not correctly explain the assertion. Lateral meristems do add thickness to plants, but they divide in two planes, not just one. Therefore, the correct answer is option 'B': Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer?.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
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Here you can find the meaning of Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Lateral meristems add thickness of plants.Reason : Lateral meristems divide only in one plane.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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