Find out the correct match in the following : Structure / Phylum / Function

Options

A. Setae / Cnidaria / Locomotion
B. Amoebocytes / Ctenophora / Defence
C. Parapodia / Annelida / Swimming
D. Sclerites / Mollusca / Respiration

Answer

To solve the question of finding the correct match between structure, phylum, and function, we will analyze each option step by step.

### Step 1: Analyze the First Option
- **Structure**: Stiff bristles
- **Phylum**: Annelida
- **Function**: Peristaltic motion

**Analysis**: Stiff bristles, known as setae, are indeed present in annelids (like earthworms) and help in locomotion, including peristaltic motion. This option appears to be correct.

### Step 2: Analyze the Second Option
- **Structure**: Amoebocyte
- **Phylum**: Cnidaria (incorrectly stated as Tinophora)
- **Function**: Defense

**Analysis**: Amoebocytes are actually found in sponges, which belong to the phylum Porifera. They play a role in digestion and transport of nutrients, not defense. Therefore, this option is incorrect.

### Step 3: Analyze the Third Option
- **Structure**: Parapodia
- **Phylum**: Annelida
- **Function**: Swimming

**Analysis**: Parapodia are indeed structures found in certain annelids (like polychaetes) and are used for swimming and locomotion. This option is correct.

### Step 4: Analyze the Fourth Option
- **Structure**: Cichlorides
- **Phylum**: Arthropoda
- **Function**: Respiration

**Analysis**: Cichlorides (more commonly known as sclerites) are not involved in respiration but are part of the exoskeleton in arthropods, providing structural support. This option is incorrect.

### Conclusion
Based on the analysis, the correct match is:
- **Parapodia** (Structure) - **Annelida** (Phylum) - **Swimming** (Function)

### Final Answer
The correct match is the third option: Parapodia - Annelida - Swimming.

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