Select erroneous pair:

Options

A. Trimerous flower - Allium cepa
B. Swollen placenta - Makoi
C. Zygomorphic flower - Iberis amara
D. Axile placentation - Radish

Answer

To solve the question of selecting the erroneous pair, we will analyze each option provided in the video transcript step by step.

### Step 1: Analyze the first pair - Trimeres Flower and Onion
- **Definition**: Trimeres flowers have three petals.
- **Example**: The flower of onion is indeed a trimeres flower.
- **Conclusion**: This pair is correct.

### Step 2: Analyze the second pair - Swollen Placenta
- **Definition**: A swollen placenta occurs when the lower part of the ovary swells due to stored food.
- **Example**: This is seen in plants with macaws.
- **Conclusion**: This pair is also correct.

### Step 3: Analyze the third pair - Zygomorphic Flower and Iberis amara
- **Definition**: Zygomorphic flowers are bilateral and can be divided into two equal parts in one plane.
- **Example**: Iberis amara is indeed a zygomorphic flower.
- **Conclusion**: This pair is correct.

### Step 4: Analyze the fourth pair - Axial Placentation and Radish
- **Definition**: Axial placentation has a prominent septum with ovules in each chamber.
- **Correct Example**: Axial placentation is found in tomatoes.
- **Incorrect Example**: Radish has parietal placentation, where ovules are located at the margins without septa.
- **Conclusion**: This pair is erroneous.

### Final Answer
The erroneous pair is the last option: Axial placentation and Radish.

---