Which one of the following statements is incorrect

Options

A. Mesoglea is present in between ectoderm and
endoderm in Obelia
B. Radial symmetry is found in Asterias
C. Fasciola is a pseudocoelomate animal
D. Taenia is a triploblastic animal

Explanation

To determine which statement is incorrect from the given options, we will analyze each statement one by one:

1. **Statement A**: "Misoclea is present in between ectoderm and endoderm in Obelia."
- **Analysis**: In the context of Obelia, which is a type of coelenterate, the mesoglea (not Misoclea) is indeed found between the ectoderm and endoderm layers. However, the statement mentions "Misoclea," which is likely a typographical error or misunderstanding. Nevertheless, the concept of having a layer between ectoderm and endoderm is correct, but the term used is incorrect. Therefore, this statement is not entirely incorrect but misleading.

2. **Statement B**: "Radial symmetry is found in Asterias."
- **Analysis**: Asterias, commonly known as starfish, indeed exhibits radial symmetry. This statement is correct.

3. **Statement C**: "Hesiola is a pseudo-silomate animal."
- **Analysis**: Hesiola (often referred to as Fasciola) is actually classified as an acoelomate animal, meaning it lacks a true body cavity. The term "pseudo-silomate" refers to animals that have a false body cavity, which does not apply to Hesiola. Therefore, this statement is incorrect.

4. **Statement D**: "Yatania is a triploblastic animal."
- **Analysis**: Triploblastic animals have three germ layers: ectoderm, mesoderm, and endoderm. Yatania is indeed a triploblastic organism, making this statement correct.

**Conclusion**: The incorrect statement among the options provided is **Statement C**: "Hesiola is a pseudo-silomate animal."