Anatomy: Dicot Stem
Which tissue arises from vascular cambium during secondary growth contributing to increased stem girth?
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About This Question
- Subject
- biology
- Chapter
- structural organisation in animals and plants
- Topic
- anatomy: dicot stem
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Secondary xylem
- Secondary Growth: Result of lateral meristem activity, specifically the vascular cambium.
- Cambium Activity: The vascular cambium is a ring of meristematic cells between the xylem and phloem.
- Tissue Production: It divides and forms:
- Secondary Xylem (wood) toward the inside (pith side).
- Secondary Phloem toward the outside (bark side).
- Mechanism: Because much more secondary xylem is produced than phloem, it is the primary tissue responsible for the massive increase in the girth (thickness) of dicot stems and roots.
This medium difficulty biology question is from the chapter structural organisation in animals and plants, covering the topic of anatomy: dicot stem. It appeared in the 2025 exam.
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