In which type of development in dicotyledoneae, basal cell forms suspensor

Options

A. Solanad type
B. Caryphylloid type
C. Crucifer type
D. Asterod type.

Answer

To solve the question "In which type of development in dicotyledoneae, does the basal cell form the suspensor?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Suspensor**:
- The suspensor is a structure that forms during the development of the embryo in plants. It is responsible for pushing the embryo into the endosperm cavity and facilitating the transfer of nutrients and plant hormones.

2. **Identify the Types of Development**:
- The question provides four options regarding the type of development in dicotyledoneae:
1. Solenoid type
2. Caryphalloid type
3. Crucifer type
4. Asteroid type

3. **Analyze Each Type**:
- **Solenoid Type**: In this type of development, the basal cell of the zygote forms the suspensor, which is a supporting structure that helps in pushing the embryo into the endosperm.
- **Caryphalloid Type**: This type does not involve the basal cell forming the suspensor.
- **Crucifer Type**: Similar to the caryphalloid type, this does not involve the basal cell forming the suspensor.
- **Asteroid Type**: This type also does not involve the basal cell forming the suspensor.

4. **Determine the Correct Answer**:
- Based on the analysis, the correct answer is the **Solenoid Type**, as it is the only type where the basal cell forms the suspensor.

### Final Answer:
The correct option is **1. Solenoid type**.