Which of the following is correct about seed dormancy ?

Options

A. The seed dormancy can be overcome by subjecting the seeds to
warm conditions or by application of certain chemicals like
gibberellic acid and nitrites.
B. An external environment like an impermeable and hard seed coat is responsible for inducing seed dormancy .
C. The presence of chemical inhibitors such as phenolic acids and para - ascorbic acid are internal factors that induce dormancy.
D. More than one option is correct.

Answer

To solve the question regarding seed dormancy, we will analyze the options provided and determine which statement is correct.

### Step-by-Step Solution:

1. **Understanding Seed Dormancy**:
- Seed dormancy is a condition where seeds do not germinate even when environmental conditions (like moisture, temperature, and light) are suitable for germination. This can be due to various internal or external factors.

2. **Analyzing the Options**:
- **Option A**: "Seed dormancy can be overcome by subjecting the seeds to warm conditions or by application of certain chemicals such as gibberellic acid and nitrates."
- This statement is **incorrect**. While gibberellic acid can help in breaking dormancy, warm conditions are generally not effective for all seeds. Many seeds require cold stratification to overcome dormancy.

- **Option B**: "An external environment like an impermeable and hard seed coat is responsible for inducing seed dormancy."
- This statement is also **incorrect**. While a hard seed coat can contribute to dormancy, it is not the sole external factor. Other environmental factors such as temperature and moisture also play significant roles.

- **Option C**: "The presence of chemical inhibitors such as phenolic acids and paraascorbic acids are the internal factors that induce dormancy."
- This statement is **correct**. Chemical inhibitors can prevent germination by affecting the metabolic processes within the seed.

- **Option D**: "More than one option is correct."
- This statement is **incorrect** since only Option C is correct.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option C**: "The presence of chemical inhibitors such as phenolic acids and paraascorbic acids are the internal factors that induce dormancy."