Which one of the following groups of three animals each is correctly matched with their one characteristic morphological features?

Options

A. `{:("Animals" , "Morphological feature" ),("Centipede, " , "Jointed "),("Prawn,Sea urchin","appendages"):}`
B. `{:("Scorpion, Spider " ,"Ventral solid "),("Cockroach","central nervous"),(" ","system"):}`
C. `{:("Cockroach " ,"Metameric "),("Locust, Taenia" , "segmentation"):}`
D. `{:("Liver fluke, " ,"Bilateral"),("Sea anemone," ,"symmetry"),("Sea cucumber",""):}`

Answer

To solve the question about which group of three animals is correctly matched with their characteristic morphological feature, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
- We need to identify a group of three animals that share a specific morphological feature correctly.

2. **Analyzing the First Group**:
- **Morphological Feature**: Jointed appendages.
- **Animals**: Centipede, Prawn, Sea Urchin.
- **Analysis**:
- Centipede: Belongs to Arthropoda (has jointed appendages).
- Prawn: Belongs to Arthropoda (has jointed appendages).
- Sea Urchin: Belongs to Echinodermata (does not have jointed appendages).
- **Conclusion**: This group is incorrectly matched because of the sea urchin.

3. **Analyzing the Second Group**:
- **Morphological Feature**: Ventral solid central nervous system.
- **Animals**: Scorpion, Spider, Cockroach.
- **Analysis**:
- Scorpion: Belongs to Arthropoda (has a ventral solid CNS).
- Spider: Belongs to Arthropoda (has a ventral solid CNS).
- Cockroach: Belongs to Arthropoda (has a ventral solid CNS).
- **Conclusion**: This group is correctly matched as all three belong to Arthropoda and share the feature.

4. **Analyzing the Third Group**:
- **Morphological Feature**: Metameric segmentation.
- **Animals**: Cockroach, Locust, Taenia.
- **Analysis**:
- Cockroach: Belongs to Arthropoda (does not exhibit true metameric segmentation).
- Locust: Belongs to Arthropoda (does not exhibit true metameric segmentation).
- Taenia: Belongs to Platyhelminthes (exhibits metameric segmentation).
- **Conclusion**: This group is incorrectly matched due to the cockroach and locust.

5. **Analyzing the Fourth Group**:
- **Morphological Feature**: Bilateral symmetry.
- **Animals**: Liver Fluke, Sea Cucumber, Sea Anemone.
- **Analysis**:
- Liver Fluke: Belongs to Platyhelminthes (exhibits bilateral symmetry).
- Sea Cucumber: Belongs to Echinodermata (exhibits radial symmetry).
- Sea Anemone: Belongs to Cnidaria (exhibits radial symmetry).
- **Conclusion**: This group is incorrectly matched because sea cucumber and sea anemone do not exhibit bilateral symmetry.

6. **Final Conclusion**:
- The only correctly matched group is the second one: **Scorpion, Spider, Cockroach** with the feature of **ventral solid central nervous system**.

### Final Answer:
The correct answer is **Scorpion, Spider, Cockroach**.