The tissue that will be present in the maximum amount in the stem of a many years old woody tree is

Options

A. Secondary Xylem
B. Secondary cortex
C. Primary xylem
D. Primary phloem

Answer

To solve the question regarding which tissue is present in the maximum amount in the stem of a many years old woody tree, we can analyze the options given and understand the characteristics of each tissue type.

### Step-by-Step Solution:

1. **Understanding the Structure of Woody Trees**:
- Woody trees have a complex structure that includes various types of tissues. As trees age, certain tissues become more prominent due to growth processes.

2. **Analyzing the Options**:
- **Option 1: Secondary Xylem**: This tissue is formed during secondary growth and is responsible for the transport of water and minerals. It is produced by the vascular cambium and accumulates over time, making it the most abundant tissue in older woody stems.
- **Option 2: Secondary Cortex**: Also known as phalloderm, this tissue is not as prominent as secondary xylem. It consists of living cells and does not accumulate in the same way as xylem.
- **Option 3: Primary Xylem**: This tissue is formed during the primary growth phase and is not present in significant amounts in older trees since it gets replaced by secondary xylem.
- **Option 4: Primary Phloem**: Similar to primary xylem, primary phloem is formed during the initial growth and is not abundant in older trees.

3. **Conclusion**:
- After analyzing all the options, it is clear that **Secondary Xylem** is the tissue that will be present in the maximum amount in the stem of a many years old woody tree. This is because it continues to be produced throughout the life of the tree and contributes significantly to the overall structure and function of the stem.

### Final Answer:
**The tissue that will be present in the maximum amount in the stem of a many years old woody tree is Secondary Xylem.**

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