Age of a dicot tree can be approximately calculated from :

Options

A. annual rings
B. height of the tree
C. girth of the trunk
D. number of branches

Explanation

To determine the age of a dicot tree, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Dicot Trees**: Dicot trees are a type of angiosperm, which means they are flowering plants. They have a unique growth pattern that includes the formation of annual rings.

2. **Identify the Growth Process**: Each year, a dicot tree produces new cells that form concentric circles known as annual rings. These rings are created due to the seasonal growth patterns of the tree.

3. **Counting Annual Rings**: The most accurate method to estimate the age of a dicot tree is to count these annual rings. Each ring typically represents one year of growth.

4. **Evaluate Other Methods**:
- **Height of the Tree**: The height of a tree does not reliably indicate its age, as growth can stop or slow down at various stages.
- **Girth of the Trunk**: While the girth (or width) of the trunk increases over time, it does not provide a precise measure of age since it can vary greatly depending on species and environmental conditions.
- **Number of Branches**: The number of branches can fluctuate due to various factors, including environmental stress or human intervention, making it an unreliable measure of age.

5. **Conclusion**: Therefore, the most reliable method for estimating the age of a dicot tree is by counting the annual rings.

### Final Answer:
The age of a dicot tree can be approximately calculated from **annual rings**.

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