The germination where epicotyl elongates and becomes curved keeping the cotyledons underground is known as

Options

A. epigeal
B. hypogeal
C. semiepigeal
D. vivipary

Answer

To solve the question about the type of germination where the epicotyl elongates and becomes curved while keeping the cotyledons underground, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- Epicotyl: The part of the seedling above the cotyledons.
- Cotyledons: The first leaves that appear from a germinating seed.
- Germination Types: Different types of germination refer to how the seedling emerges from the seed.

2. **Analyze the Options**:
- **Apical**: This term generally refers to the tip or apex of a plant. It does not specifically relate to the germination process described.
- **Hypogeal**: This type of germination occurs when the epicotyl elongates and pushes the shoot above the ground while the cotyledons remain underground.
- **Semi-apical**: This term suggests a partial emergence, which does not fit the description given in the question.
- **Vivipary**: This refers to a form of germination where seeds germinate while still attached to the parent plant, which is not relevant here.

3. **Identify the Correct Answer**:
- The question specifically describes the germination where the epicotyl elongates and the cotyledons remain underground. This matches the definition of **hypogeal germination**.

4. **Conclusion**:
- Therefore, the correct answer is **hypogeal**.

### Final Answer:
The germination where the epicotyl elongates and becomes curved keeping the cotyledons underground is known as **hypogeal germination**.