Lysigenous cavity is present in monocot stem.

Answer

To determine whether the statement "Lysigenous cavity is present in monocot stem" is true or false, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Lysigenous Cavity**: This refers to a cavity that forms as a result of the breakdown of cells, leading to the formation of spaces within plant tissues.
- **Monocot Stem**: Monocots are a group of flowering plants that have one embryonic seed leaf or cotyledon. Examples include grasses, lilies, and maize.

2. **Examine Monocot Stem Structure**:
- In monocot stems, the vascular bundles are scattered throughout the stem rather than arranged in a ring as in dicots.
- The xylem in monocots is typically Y-shaped, with protoxylem located at the lower part of the xylem structure.

3. **Identify the Presence of Lysigenous Cavities**:
- In monocot stems, particularly in plants like maize, the protoxylem can undergo disintegration. This disintegration leads to the formation of lysigenous cavities.
- These cavities can also be referred to as lacunae.

4. **Conclusion**:
- Since the lysigenous cavities are formed due to the disintegration of protoxylem in monocot stems, the statement that "Lysigenous cavity is present in monocot stem" is true.

### Final Answer:
The statement "Lysigenous cavity is present in monocot stem" is **True**.

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