Which group of animals belong to the same phylum ?

Options

A. Earthworm, Pinworm, Tapeworm
B. Prawn, Scorpizon, Locusta
C. Sponge, Sea anemone, Starfish
D. Malarial parasite, Amoeba, Mosquito

Answer

To determine which group of animals belongs to the same phylum, we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Identify the Animals in Each Option:**
- **Option A:** Earthworm, Pinworm, and Tapeworm.
- **Option B:** Prawn, Scorpion, and Locusta.
- **Option C:** Sponge, Sea Anemone, and Starfish.
- **Option D:** Malarial parasite (Plasmodium), Amoeba, and Mosquito.

2. **Determine the Phylum for Each Animal in Option A:**
- **Earthworm:** Belongs to the phylum **Annelida**.
- **Pinworm:** Belongs to the phylum **Nematoda** (roundworms).
- **Tapeworm:** Belongs to the phylum **Platyhelminthes** (flatworms).
- **Conclusion:** All three belong to different phyla. **Option A is incorrect.**

3. **Determine the Phylum for Each Animal in Option B:**
- **Prawn:** Belongs to the phylum **Arthropoda**.
- **Scorpion:** Also belongs to the phylum **Arthropoda**.
- **Locusta (a type of grasshopper):** Also belongs to the phylum **Arthropoda**.
- **Conclusion:** All three belong to the same phylum, **Arthropoda. Option B is correct.**

4. **Determine the Phylum for Each Animal in Option C:**
- **Sponge:** Belongs to the phylum **Porifera**.
- **Sea Anemone:** Belongs to the phylum **Cnidaria**.
- **Starfish:** Belongs to the phylum **Echinodermata**.
- **Conclusion:** All three belong to different phyla. **Option C is incorrect.**

5. **Determine the Phylum for Each Animal in Option D:**
- **Malarial Parasite (Plasmodium):** Belongs to the phylum **Protozoa**.
- **Amoeba:** Also belongs to the phylum **Protozoa**.
- **Mosquito:** Belongs to the phylum **Arthropoda**.
- **Conclusion:** Plasmodium and Amoeba belong to the same phylum, but Mosquito belongs to a different phylum. **Option D is incorrect.**

### Final Conclusion:
The correct answer is **Option B: Prawn, Scorpion, and Locusta**, as they all belong to the phylum **Arthropoda**.

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