The embryo axis is called

Options

A. plumule
B. epicotyl
C. hypocotyl
D. tigellum

Answer

To answer the question "The embryo axis is called," we will analyze the options provided and identify the correct term.

### Step-by-Step Solution:

1. **Understanding the Embryo Axis**: The embryo axis refers to the part of the seed that develops into the plant. It consists of different parts that will eventually form the shoot and root systems of the plant.

2. **Analyzing the Options**:
- **Plumule**: This is the part of the embryo that develops into the shoot. It is not the entire axis but a specific part of it.
- **Apicotyle**: This is the section of the embryo that is located between the plumule and the cotyledon. It is also not the entire axis.
- **Hypocotyle**: This part is located between the radical (root) and the cotyledons. Like the previous terms, it is not the complete axis.
- **Tigellum**: This term refers specifically to the entire embryonal axis, which includes the parts that will develop into both the shoot and the root.

3. **Conclusion**: Based on the definitions and functions of the parts of the embryo, the correct answer to the question "The embryo axis is called" is **Tigellum**.

### Final Answer:
The embryo axis is called **Tigellum**.

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