The portion of tigellum below the level of cotyledons in dicot embryo is termed as

Options

A. Scutellum
B. Epiblast
C. Hypocotyl
D. Epicotyl

Answer

To solve the question regarding the portion of the tigellum below the level of cotyledons in a dicot embryo, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terminology**:
- The term "tigellum" refers to the embryonal axis of the plant embryo. It is important to know that this structure connects the cotyledons (seed leaves) to the root.

2. **Identify the Parts of the Tigellum**:
- The tigellum can be divided into two main parts based on its position relative to the cotyledons:
- **Above the Cotyledons**: This part is known as the **apicotyle**.
- **Below the Cotyledons**: This part is known as the **hypocotyle**.

3. **Analyze the Options**:
- The question provides four options:
1. Ascutelum
2. Epiblast
3. Hypocotyle
4. Apicotyle
- From our understanding, the hypocotyle is the section of the tigellum that is located below the cotyledons.

4. **Eliminate Incorrect Options**:
- **Scutellum**: This is a term associated with monocots, not dicots.
- **Epiblast**: This refers to an immature structure in monocots, not relevant to dicots.
- **Apicotyle**: This refers to the part above the cotyledons, which is not what we are looking for.

5. **Conclusion**:
- The correct answer is the **hypocotyle**, as it is the portion of the tigellum located below the level of the cotyledons in a dicot embryo.

### Final Answer:
The portion of tigellum below the level of cotyledons in a dicot embryo is termed as **Hypocotyle**.