Biradial symmetry is found in

Options

A. sea fan
B. sea pan
C. sea walnut
D. sea fur

Answer

**Step-by-Step Solution:**

1. **Understanding Biradial Symmetry**: Biradial symmetry is a type of symmetry where an organism can be divided into equal halves along two planes. This means that the organism has a symmetrical arrangement that allows for two lines of symmetry.

2. **Distinguishing Between Symmetries**: It is important to differentiate biradial symmetry from other types of symmetry:
- **Radial Symmetry**: An organism can be divided into equal parts from multiple planes. This is common in organisms like jellyfish and sea anemones.
- **Bilateral Symmetry**: An organism can be divided into equal halves along one plane, which is typical in animals like humans and most vertebrates.

3. **Identifying Examples of Biradial Symmetry**: In the context of the question, we need to identify which of the provided organisms exhibit biradial symmetry. The organisms mentioned are:
- Sea fan
- Sea pen
- Sea walnut
- Cnidarians (like jellyfish)

4. **Analyzing Each Organism**:
- **Sea Fan**: Exhibits radial symmetry.
- **Sea Pen**: Exhibits radial symmetry.
- **Sea Walnut**: Exhibits biradial symmetry, as it can be divided into equal parts along two planes.
- **Cnidarians**: Generally exhibit radial symmetry.

5. **Conclusion**: Among the given options, the organism that exhibits biradial symmetry is the **Sea Walnut**.

**Final Answer**: Biradial symmetry is found in the Sea Walnut.

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