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.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
About This Question
- Subject
- biology
- Chapter
- structural organisation in animals and plants
- Topic
- numerical: growth ring count
- Difficulty
- Easy
- Year
- 2025
Solution
Correct 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.
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.
Looking for more practice? Explore all biology questions or browse structural organisation in animals and plants questions on RankGuru.