Which of the following is incorrect about tyloses

Options

A. They are balloon like structures
B. They develop from xylem parenchyma
C. They are called as tracheal plug
D. They develop in the sap wood

Answer

To determine which statement about tyloses is incorrect, let's analyze each option step by step:

### Step 1: Understand Tyloses
Tyloses are balloon-like structures that form in the xylem of plants. They are outgrowths from xylem parenchyma cells.

**Hint:** Tyloses are specifically associated with xylem tissue.

### Step 2: Identify the Origin of Tyloses
Tyloses develop from xylem parenchyma cells. This is a correct statement.

**Hint:** Remember that parenchyma cells are a type of plant cell involved in storage and tissue repair.

### Step 3: Function of Tyloses
Tyloses serve as tracheal plugs, which means they can block the xylem vessels to prevent the spread of pathogens and protect the vascular tissue during stress.

**Hint:** Think about how plants defend themselves against infections.

### Step 4: Location of Tyloses Formation
Tyloses typically develop in the heartwood, not in the sapwood. This is where the incorrect statement lies.

**Hint:** Heartwood is the inner part of the tree trunk, while sapwood is the outer living layer.

### Step 5: Conclusion
The incorrect statement about tyloses is that they develop in the sapwood. They actually develop in the heartwood.

**Final Answer:** The incorrect statement is that tyloses develop in the sapwood.

### Summary of Steps:
1. Understand what tyloses are.
2. Identify that they originate from xylem parenchyma.
3. Recognize their function as tracheal plugs.
4. Note that they form in heartwood, not sapwood.
5. Conclude which statement is incorrect.