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

Options

A. Scarification
B. Stratification
C. Vernalisation
D. Denudation.

Answer

To determine which method makes the seed coat permeable and allows the growth of the embryo, we can analyze the options provided:

1. **Scarification**: This method involves the weakening or opening of the seed coat to initiate germination. It is specifically used for seeds that are impervious to water and gases. By making the seed coat permeable, scarification allows water and oxygen to enter the seed, which is essential for the growth of the embryo.

2. **Stratification**: This term refers to a range of processes that simulate natural conditions required for seeds before germination can occur. While it is important for seed germination, it does not specifically make the seed coat permeable.

3. **Vernalization**: This process is related to the induction of flowering in plants through exposure to prolonged cold. It does not pertain to seed germination or the permeability of the seed coat.

4. **Denudation**: This term describes processes of erosion and does not relate to seed germination or the permeability of seed coats.

Based on the analysis, the correct answer is **scarification**, as it specifically makes the seed coat permeable and facilitates the growth of the embryo.

### Steps:
1. **Identify the options**: Look at the methods provided: scarification, stratification, vernalization, and denudation.
2. **Analyze each method**:
- **Scarification**: Weakens and opens the seed coat, allowing water and gases to enter.
- **Stratification**: Stimulates natural conditions for germination but does not directly affect seed coat permeability.
- **Vernalization**: Induces flowering, not related to seed germination.
- **Denudation**: Involves erosion processes, irrelevant to seed coats.
3. **Determine the correct method**: Conclude that scarification is the method that makes the seed coat permeable and allows for embryo growth.