Radial cleavage is found in

Options

A. Tunicates
B. Protozoans
C. Coelenterates
D. Annelids

Answer

**Step-by-Step Solution:**

1. **Understanding Radial Cleavage**: Radial cleavage is a type of embryonic development where the cells divide in a symmetrical manner around a central axis. This means that the cleavage planes are arranged radially, allowing for equal division of the cells.

2. **Identifying Organisms with Radial Symmetry**: Organisms that exhibit radial symmetry can be divided into similar halves through multiple planes. This characteristic is crucial in determining which organisms display radial cleavage.

3. **Analyzing the Options**: The options given are:
- Tunicates
- Protozoans
- Coelenterates
- Annelids

4. **Determining the Correct Answer**:
- **Tunicates**: These are not known for radial cleavage; they have a different type of embryonic development.
- **Protozoans**: While some protozoans may exhibit various forms of cleavage, they are not specifically known for radial cleavage.
- **Coelenterates**: These organisms, which include jellyfish and corals, exhibit radial symmetry and are known to undergo radial cleavage during their embryonic development.
- **Annelids**: These organisms, such as earthworms, typically exhibit spiral cleavage rather than radial cleavage.

5. **Conclusion**: Based on the analysis, coelenterates are the organisms where radial cleavage is found due to their radial symmetry.

**Final Answer**: Radial cleavage is found in **Coelenterates**.

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