How many of the following are the examples Fiveof Molluscs? Cucumaria, Asterias, Pila, Pinctada, Antedon, Aplysia and Balanoglossus

Options

A. Five
B. Four
C. Three
D. Two

Answer

To determine how many of the given animals are examples of Molluscs, we will analyze each one:

1. **Cucumaria**: This organism belongs to the phylum Echinodermata. It is commonly known as a sea cucumber. Therefore, it is **not** a Mollusc.

2. **Asterias**: This is a starfish, which also belongs to the phylum Echinodermata. Hence, it is **not** a Mollusc.

3. **Pila**: This organism is a freshwater snail and is indeed a member of the phylum Mollusca. Therefore, it **is** a Mollusc.

4. **Pinctada**: This is a genus of saltwater clams, commonly known as pearl oysters. It is also a member of the phylum Mollusca. Therefore, it **is** a Mollusc.

5. **Antedon**: This organism is a feather star, which belongs to the phylum Echinodermata. Therefore, it is **not** a Mollusc.

6. **Aplysia**: This is a genus of sea slugs, also known as sea hares, and is a member of the phylum Mollusca. Therefore, it **is** a Mollusc.

7. **Balanoglossus**: This organism is a hemichordate and is not part of the Mollusca phylum. Therefore, it is **not** a Mollusc.

Now, summarizing the findings:
- Molluscs identified: Pila, Pinctada, Aplysia
- Total number of Molluscs: **3**

Thus, the answer to the question is that **3** of the given examples are Molluscs.