Which group of animals belong to the same phylum?
- Prawn, Scorpion, Locusta
- Sponge, Sea anemone, Starfish
- Malarial parasite, Amoeba, Mosquito
- Earthworm, Pinworm, Tapeworm
Answer
(1) Prawn, Scorpion, Locusta
Solution
Prawn, scorpion and Locusta (locust) all have jointed appendages and a chitinous exoskeleton ⇒ all belong to Phylum Arthropoda.
∵ Sponge (Porifera), sea anemone (Coelenterata) and starfish (Echinodermata) differ; malarial parasite and Amoeba are protists while mosquito is an arthropod; earthworm (Annelida), pinworm (Aschelminthes) and tapeworm (Platyhelminthes) differ,
∴ only group (1) belongs to one phylum.
Answer: (1)