Which among the following belong to same phyla?

Options

A. Physalia, obelia, Pleurobranchia – Coelenterata
B. Bombyx, Palaemon, Limulus – Arthropoda
C. Star fish, jelly fish, Sea urchin – Echinodermata
D. Cuttle fish, devil fish, Patella – mollusca

Answer

To solve the question of which among the following organisms belong to the same phyla, we need to analyze each option provided:

1. **Option 1: Physalia, Obelia, Pleurobranchia**
- Physalia (Portuguese man o' war) belongs to the phylum **Cnidaria**.
- Obelia (a colonial organism) also belongs to the phylum **Cnidaria**.
- Pleurobranchia (a type of comb jelly) belongs to the phylum **Ctenophora**.
- **Conclusion**: These three do not belong to the same phylum.

2. **Option 2: Bombix, Palaemon, Limulus**
- Bombix (silkworm) belongs to the phylum **Arthropoda**.
- Palaemon (prawn) also belongs to the phylum **Arthropoda**.
- Limulus (horseshoe crab) belongs to the phylum **Arthropoda**.
- **Conclusion**: All three belong to the same phylum, which is **Arthropoda**.

3. **Option 3: Starfish, Jellyfish, Sea Urchin**
- Starfish belongs to the phylum **Echinodermata**.
- Jellyfish (Aurelia) belongs to the phylum **Cnidaria**.
- Sea Urchin also belongs to the phylum **Echinodermata**.
- **Conclusion**: These three do not belong to the same phylum.

4. **Option 4: Cuttlefish, Devil Fish, Patella**
- Cuttlefish belongs to the phylum **Mollusca**.
- Devil Fish (also known as the Manta Ray) belongs to the phylum **Chordata**.
- Patella (a type of limpet) belongs to the phylum **Mollusca**.
- **Conclusion**: These three do not belong to the same phylum.

After analyzing all the options, we find that the correct answer is **Option 2: Bombix, Palaemon, Limulus**, as all three belong to the same phylum, **Arthropoda**.