A vascular bundle in which phloem is present on both sides of the xylem and separated from it by strips of cambium is said to be-

Options

A. Collateral open
B. Bicollateral open
C. Concentric
D. Bicollateral closed

Answer

To solve the question regarding the type of vascular bundle where phloem is present on both sides of the xylem and separated by strips of cambium, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Vascular Bundles**: Vascular bundles are arrangements of xylem and phloem in plants. They play a crucial role in the transport of water, nutrients, and food.

2. **Identify the Arrangement**: The question specifies that phloem is present on both sides of the xylem. This indicates a specific arrangement of the vascular tissues.

3. **Define Key Terms**:
- **Phloem**: Tissue responsible for the transport of nutrients, particularly sugars.
- **Xylem**: Tissue responsible for the transport of water and minerals.
- **Cambium**: A layer of tissue that can divide to form new xylem and phloem.

4. **Differentiate Types of Vascular Bundles**:
- **Collateral Open**: Xylem and phloem are on the same radius with cambium present between them.
- **Bicolateral Open**: Phloem is present on both sides of the xylem with cambium separating them.
- **Concentric**: One type of tissue surrounds another, lacking cambium.
- **Bicolateral Closed**: Similar to bicolateral but without cambium.

5. **Analyze the Given Options**:
- **Collateral Open**: Incorrect as it has phloem on one side only.
- **Bicolateral Open**: Correct as it has phloem on both sides with cambium present.
- **Concentric**: Incorrect as it lacks cambium.
- **Bicolateral Closed**: Incorrect as it lacks cambium.

6. **Conclusion**: The correct answer is **bicolateral open**, as it matches the description of having phloem on both sides of the xylem with cambium present.

### Final Answer:
The vascular bundle in which phloem is present on both sides of the xylem and separated from it by strips of cambium is said to be **bicolateral open**.