Vascular bundles in cucurbita stem are -

Options

A. Bicollateral & open
B. Bicollateral & clossed
C. Colateral & open
D. Amphivasal

Answer

**Step-by-Step Solution:**

1. **Understanding Vascular Bundles**: Vascular bundles are the part of the plant that contains xylem and phloem, which are responsible for the transport of water, nutrients, and food.

2. **Types of Vascular Bundles**: Vascular bundles can be categorized into different types:
- **Collateral**: Where xylem and phloem are arranged side by side.
- **Bicollateral**: Where there are two phloem tissues on either side of the xylem.
- **Open vs. Closed**:
- **Open**: Contains a cambium layer between xylem and phloem, allowing for secondary growth.
- **Closed**: Lacks cambium, meaning no secondary growth occurs.

3. **Identifying the Type in Cucurbita**: In the case of the Cucurbita stem (which belongs to the Cucurbitaceae family), the vascular bundles are identified as bicollateral and open. This means:
- The xylem is located in the center.
- There are phloem tissues on both sides of the xylem.
- A cambium layer is present between the xylem and the phloem, allowing for secondary growth.

4. **Conclusion**: Therefore, the correct classification of vascular bundles in Cucurbita stems is "Bicollateral and Open".

5. **Final Answer**: The answer to the question is **Option A: Bicollateral and Open**.

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