The ratio of phloem strips, xylem strips and cambial strips found in bicollateral vascular bundle of Solanum

Options

A. `1:1:1`
B. `2: 2:2`
C. `2: 2 :1`
D. `2:1:2`

Answer

To solve the question regarding the ratio of phloem strips, xylem strips, and cambial strips found in the bicollateral vascular bundle of Solanum, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Vascular Bundle Types**:
- Vascular bundles in plants can be classified into different types based on the arrangement of xylem and phloem. The types include radial, conjoined, collateral, and bicollateral.

2. **Identify the Bicollateral Vascular Bundle**:
- In a bicollateral vascular bundle, the arrangement consists of two phloem strips located on either side of a central xylem strip.

3. **Analyze the Structure**:
- In the bicollateral arrangement:
- There are two phloem strips: one on the outer side and one on the inner side.
- There is one xylem strip located in the center.
- There are two cambial strips, one between each phloem and the xylem.

4. **Count the Strips**:
- From the above analysis:
- Phloem strips = 2
- Xylem strips = 1
- Cambial strips = 2

5. **Formulate the Ratio**:
- The ratio of phloem strips to xylem strips to cambium strips can be expressed as:
- Phloem : Xylem : Cambium = 2 : 1 : 2

6. **Select the Correct Option**:
- Based on the calculated ratio, the correct answer corresponds to the option that represents 2 : 1 : 2.

### Final Answer:
The ratio of phloem strips, xylem strips, and cambial strips found in the bicollateral vascular bundle of Solanum is **2 : 1 : 2**.