Numerical: Growth Ring Count
Easybiology
A tree trunk cross-section shows 28 distinct annual rings. Assuming one ring forms each year, how old is the tree?
Select the correct option:
Solution
Incorrect! Answer:
28 years
- Secondary Growth: In woody plants, the vascular cambium activity varies with seasons, leading to the formation of 'Annual Rings'.
- Annual Ring: Each ring consists of two parts:
- Spring Wood: Light and wide, formed when growth is rapid.
- Autumn/Winter Wood: Dark and narrow, formed when growth is slow.
- Calculation: One annual ring (Spring + Autumn wood) represents exactly one year of growth.
- Answer: 28 rings → 28 years old.
- Dendrochronology: The science of dating the age of trees by counting these rings.
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About This Question
- Subject
- biology
- Chapter
- structural organisation in animals and plants
- Topic
- numerical: growth ring count
- Difficulty
- Easy
- Year
- 2025
This easy difficulty biology question is from the chapter structural organisation in animals and plants, covering the topic of numerical: growth ring count. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of structural organisation in animals and plants concepts.
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