Which one of the following is not the part of a seed?

Options

A. zygote
B. plumule
C. testa
D. Radical

Answer

To determine which of the following is not a part of a seed, we need to analyze the options given:

1. **Zygote**
2. **Plumule**
3. **Testa**
4. **Radicle**

### Step-by-Step Solution:

**Step 1: Understand the components of a seed.**
- A seed is a reproductive unit of flowering plants that contains an embryo and is capable of developing into a new plant.

**Step 2: Identify the parts of a seed.**
- **Plumule**: This is the part of the seed embryo that develops into the shoot and the first true leaves of the plant.
- **Testa**: This is the protective outer layer of the seed, also known as the seed coat.
- **Radicle**: This is the embryonic root of the plant, which grows down into the soil.

**Step 3: Analyze the option 'Zygote'.**
- The zygote is the initial cell formed when a new organism is produced by means of sexual reproduction. It develops into the embryo, which is part of the seed, but the zygote itself is not a part of the seed.

**Step 4: Conclusion.**
- Among the options given, **Zygote** is not a part of the seed. The other three options (Plumule, Testa, and Radicle) are indeed parts of a seed.

### Final Answer:
The correct answer is **Zygote** (Option A).

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