Primary root originates from :-

Options

A. Radicle of embryo
B. Plumule of embryo
C. Coleorhiza of embryo
D. Secutellum of embryo

Answer

To answer the question "Primary root originates from:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Embryo**:
- In the context of plant development, the embryo consists of several parts, including the radical, plumule, cotyledons, and others.

2. **Identifying the Parts of the Embryo**:
- The **radical** is the part of the embryo that develops into the primary root.
- The **plumule** develops into the shoot system.
- The **cotyledons** (in dicots) and **scutellum** (in monocots) serve as seed leaves and storage organs.

3. **Recognizing the Role of the Radical**:
- The radical is specifically responsible for forming the primary root. It is the first root that emerges from the seed during germination.

4. **Eliminating Incorrect Options**:
- The **plumule** does not give rise to the root; it develops into the shoot.
- The **choleraza** is not a recognized part of the embryo in this context.
- The **scutellum** is specific to monocots and does not form the primary root.

5. **Conclusion**:
- Therefore, the primary root originates from the **radical of the embryo**.

### Final Answer:
The primary root originates from the **radical of the embryo**.

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