What is true about Nereis scorpion, Cockroach and silver fish

Options

A. They all belong to the same phylum
B. They all have jointed paired appendages
C. They all possess dorsal heart
D. None of them is aquatic

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: The question lists four organisms: Nereis, Scorpion, Cockroach, and Silverfish.

2. **Determine the Phylum of Each Organism**:
- **Nereis**: This organism belongs to the phylum **Annelida**.
- **Scorpion, Cockroach, Silverfish**: These organisms belong to the phylum **Arthropoda**.

3. **Analyze the Options**:
- **Option A**: "They all belong to the same phylum."
- This is incorrect because Nereis is from Annelida, while the others are from Arthropoda.

- **Option B**: "They all have jointed paired appendages."
- This is also incorrect. Jointed appendages are characteristic of Arthropoda, not Annelida. Nereis does not have jointed paired appendages.

- **Option C**: "They all possess a dorsal heart."
- This is correct. Non-chordates, which include both Annelida and Arthropoda, typically have a dorsal heart. Therefore, this feature applies to all four organisms.

4. **Conclusion**: The correct statement about Nereis, Scorpion, Cockroach, and Silverfish is that they all possess a dorsal heart, making **Option C** the correct answer.

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