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Girth of stem increases due to
- a)apical meristem
- b)lateral meristem
- c)intercalary meristem
- d)vertical meristem
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Girth of stem increases due toa)apical meristemb)lateral meristemc)int...
The girth of the stem increases due to lateral meristem or cambium
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Girth of stem increases due toa)apical meristemb)lateral meristemc)int...
Understanding Lateral Meristem
The girth of a stem increases due to the activity of lateral meristem. This process is known as secondary growth, which is crucial for the development of woody plants.
What is Lateral Meristem?
- Lateral meristem consists of two main types:
- Vascular cambium: Produces secondary xylem (wood) and secondary phloem (bark).
- Cork cambium: Forms the protective outer covering of stems and roots.
Role in Stem Girth
- Secondary Growth:
- Lateral meristems contribute to the thickness of the stem by adding layers of cells.
- As the vascular cambium divides, it adds new xylem cells toward the inside and phloem cells toward the outside.
- Formation of Wood:
- The continuous production of xylem cells leads to an increase in stem girth, which provides structural support and facilitates nutrient and water transport.
Comparison with Other Meristems
- Apical Meristem:
- Located at the tips of roots and shoots, responsible for primary growth (lengthening).
- Intercalary Meristem:
- Found at the base of leaves or internodes, aiding in elongation but not in girth.
- Vertical Meristem:
- This term is not commonly used in botanical terminology and may refer to apical meristems.
Conclusion
In summary, the increase in the girth of a stem is primarily due to the activity of lateral meristems, which facilitate secondary growth, making them essential for the overall growth and stability of woody plants.
The girth of a stem increases due to the activity of lateral meristem. This process is known as secondary growth, which is crucial for the development of woody plants.
What is Lateral Meristem?
- Lateral meristem consists of two main types:
- Vascular cambium: Produces secondary xylem (wood) and secondary phloem (bark).
- Cork cambium: Forms the protective outer covering of stems and roots.
Role in Stem Girth
- Secondary Growth:
- Lateral meristems contribute to the thickness of the stem by adding layers of cells.
- As the vascular cambium divides, it adds new xylem cells toward the inside and phloem cells toward the outside.
- Formation of Wood:
- The continuous production of xylem cells leads to an increase in stem girth, which provides structural support and facilitates nutrient and water transport.
Comparison with Other Meristems
- Apical Meristem:
- Located at the tips of roots and shoots, responsible for primary growth (lengthening).
- Intercalary Meristem:
- Found at the base of leaves or internodes, aiding in elongation but not in girth.
- Vertical Meristem:
- This term is not commonly used in botanical terminology and may refer to apical meristems.
Conclusion
In summary, the increase in the girth of a stem is primarily due to the activity of lateral meristems, which facilitate secondary growth, making them essential for the overall growth and stability of woody plants.
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Girth of stem increases due toa)apical meristemb)lateral meristemc)intercalary meristemd)vertical meristemCorrect answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Girth of stem increases due toa)apical meristemb)lateral meristemc)intercalary meristemd)vertical meristemCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Girth of stem increases due toa)apical meristemb)lateral meristemc)intercalary meristemd)vertical meristemCorrect answer is option 'B'. Can you explain this answer?.
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