All plants have two cotyledons in their seed, except

Options

A. Pea
B. Eucalyptus
C. Sunflower
D. Orchids

Answer

To solve the question "All plants have two cotyledons in their seed, except," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Cotyledons**: Cotyledons are the first leaves that appear from a seed. They play a crucial role in the early development of the plant.

2. **Categorize Plants Based on Cotyledons**: Plants are primarily categorized into two groups based on the number of cotyledons:
- **Monocots**: These plants have one cotyledon in their seeds. Examples include grasses, lilies, and orchids.
- **Dicots**: These plants have two cotyledons in their seeds. Examples include beans, sunflowers, and eucalyptus.

3. **Identify the Question's Requirement**: The question asks for the exception to the statement that all plants have two cotyledons. Thus, we need to identify a plant that is a monocot.

4. **Evaluate the Options**:
- **Eucalyptus**: This is a dicot (two cotyledons).
- **Sunflower**: This is also a dicot (two cotyledons).
- **Pea**: This is a dicot (two cotyledons).
- **Orchid**: This is a monocot (one cotyledon).

5. **Conclusion**: Since orchids are monocots, they are the exception to the statement that all plants have two cotyledons. Therefore, the correct answer is **Orchid**.

### Final Answer:
The correct answer is **Orchid**.

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