Which of the following animals belong to the same phylum?

Options

A. Pila, Octopus, Balanoglossus
B. Pila, Pinctada, Sepia
C. Pila, Asterias, Ophiura
D. Saccoglossus, Loligo, Octopus

Answer

To determine which animals belong to the same phylum, we need to categorize the given animals based on their taxonomical classification. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understand Taxonomical Hierarchy**:
- The taxonomical hierarchy consists of several levels: Kingdom, Phylum, Class, Order, Genus, and Species. Phylum is the second level in this hierarchy.

2. **Identify the Animals**:
- We need to analyze the given animals in the options. In the video, the animals mentioned are Pila, Octopus, Belenoglossus, Pinnictada, Sepia, Asterius, Ophiura, and Saccoglossus.

3. **Classify Each Animal**:
- **Pila**: Belongs to the Phylum Mollusca.
- **Octopus**: Also belongs to the Phylum Mollusca.
- **Belenoglossus**: Belongs to the Phylum Hemichordata.
- **Pinnictada**: Belongs to the Phylum Mollusca.
- **Sepia**: Belongs to the Phylum Mollusca.
- **Asterius**: Belongs to the Phylum Echinodermata.
- **Ophiura**: Also belongs to the Phylum Echinodermata.
- **Saccoglossus**: Belongs to the Phylum Hemichordata.

4. **Group the Animals by Phylum**:
- **Mollusca**: Pila, Octopus, Pinnictada, Sepia.
- **Hemichordata**: Belenoglossus, Saccoglossus.
- **Echinodermata**: Asterius, Ophiura.

5. **Identify the Correct Group**:
- From the classification, we see that Pila, Pinnictada, and Sepia all belong to the same phylum, which is Mollusca.

6. **Conclusion**:
- Therefore, the correct answer to the question "Which of the following animals belong to the same phylum?" is option B: Pila, Pinnictada, and Sepia.