All plants have two cotyledons in their seed, except

Options

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

Answer

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

### Step 1: Understand Cotyledons
Cotyledons are the first leaves that appear from a seed. They are crucial for the early stages of a plant's growth. Plants can be classified based on the number of cotyledons in their seeds into two main categories: dicots (two cotyledons) and monocots (one cotyledon).

### Step 2: Identify the Groups
- **Dicots**: These plants have two cotyledons. Examples include beans, sunflowers, and eucalyptus.
- **Monocots**: These plants have one cotyledon. Examples include grasses, lilies, and orchids.

### Step 3: Analyze the Options
The question provides four options, and we need to identify which one is the exception (the plant with only one cotyledon).
- **Option 1**: P (a dicot) - Incorrect, as it has two cotyledons.
- **Option 2**: Eucalyptus (a dicot) - Incorrect, as it has two cotyledons.
- **Option 3**: Sunflower (a dicot) - Incorrect, as it has two cotyledons.
- **Option 4**: Orchid (a monocot) - Correct, as it has only one cotyledon.

### Step 4: Conclusion
The only plant from the options provided that has only one cotyledon is the orchid. Therefore, the answer to the question is:

**Answer: Orchid (Option 4)**

---