Which method makes the seed coat permeable and allows growth of embryo ?

Options

A. Scarification
B. Stratification
C. Vernalization
D. All of the above

Answer

To solve the question "Which method makes the seed coat permeable and allows growth of embryo?", we can analyze the options provided:

1. **Understanding the Options**:
- **A. Scarification**: This is a process where the seed coat is mechanically or chemically altered to allow water and gases to penetrate. This is particularly useful for seeds with hard coats that are dormant and need to be treated to germinate.
- **B. Stratification**: This involves exposing seeds to cold temperatures to simulate winter conditions, which can help break dormancy but does not directly make the seed coat permeable.
- **C. Vernalization**: This is the process of inducing flowering in plants by exposing them to prolonged cold. It does not relate to seed coat permeability.
- **D. All of the above**: This option suggests that all methods contribute to making the seed coat permeable, which is not accurate.

2. **Analyzing Scarification**:
- Scarification is specifically designed to break down the hard seed coat, allowing water to enter and enabling the embryo to grow. This process can involve physical methods (like scratching or nicking the seed coat) or chemical methods (using acids or other substances).

3. **Conclusion**:
- Based on the analysis, the method that makes the seed coat permeable and allows for the growth of the embryo is **A. Scarification**.

### Final Answer:
The correct answer is **A. Scarification**.