"Comb jellies " or "Sea Walnuts" belong to the phylum.

Options

A. Coelenterata
B. Ctenophora
C. Mollusca
D. Echinodermata

Answer

To determine which phylum "comb jellies" or "sea walnuts" belong to, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**: Start by recognizing what "comb jellies" and "sea walnuts" are. These are marine animals known for their gelatinous bodies and unique locomotion using cilia.

2. **Review the Options**: The question provides several phylum options:
- A) Sealantrata
- B) Tinophora
- C) Mollusca
- D) Echinodermata

3. **Evaluate Each Option**:
- **Option A: Sealantrata**: This phylum includes organisms like jellyfish, corals, and anemones. Since comb jellies are not included here, this option is incorrect.
- **Option B: Tinophora**: This is the phylum that specifically includes comb jellies and sea walnuts. Therefore, this option is correct.
- **Option C: Mollusca**: This phylum includes animals like octopuses, squids, and snails. Since comb jellies do not belong to this group, this option is incorrect.
- **Option D: Echinodermata**: This phylum includes starfish, sea urchins, and sea cucumbers. Since comb jellies are not part of this group, this option is also incorrect.

4. **Conclusion**: After evaluating all the options, the only correct answer is **Option B: Tinophora**.

### Final Answer:
Comb jellies or sea walnuts belong to the phylum **Tinophora**.

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