Conjoint, collateral, endarch and closed vascular bundles are found in

Options

A. Monocot root
B. Monocut stem
C. Dicot root
D. Dicot stem

Answer

To solve the question regarding where conjoint, collateral, endarch, and closed vascular bundles are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Conjoint Vascular Bundles**: These are vascular bundles where xylem and phloem are located together.
- **Collateral Vascular Bundles**: In this arrangement, phloem is located outside the xylem.
- **Endarch Condition**: This refers to the arrangement where protoxylem (the first formed xylem) is located towards the center and metaxylem (the later formed xylem) is located towards the outside.
- **Closed Vascular Bundles**: These bundles lack cambium, meaning there is no potential for secondary growth.

2. **Analyze the Options**:
- **Monocot Root**: Typically has radial vascular bundles, not the type described.
- **Monocot Stem**: Generally exhibits conjoint, collateral, endarch, and closed vascular bundles.
- **Dicot Root**: Also has radial vascular bundles, which do not fit the description.
- **Dicot Stem**: While it has conjoint vascular bundles, they are open (with cambium) rather than closed.

3. **Identify the Correct Answer**:
- Based on the definitions and the analysis of the options, the only structure that contains conjoint, collateral, endarch, and closed vascular bundles is the **monocot stem**.

### Final Answer:
The correct answer is **monocot stem**.

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