The given diagram shows the cross-sectional view of a woody stem.Based on the examination of annual rings, it can be inferred that the age of this tree is
Correct answer: B. 12 years
- A. 10 years
- B. 12 years
- C. 14 years
- D. 16 years
Explanation
The age of a tree can be determined by counting its annual rings, which are visible in the cross-sectional view of the woody stem. Each ring represents one year of growth. In the given diagram, there are 12 distinct annual rings, indicating that the tree is 12 years old. So option B is correct. Option A,C and D give incorrect age.
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Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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