Question -
Which one of the following is a matching set of phylum and its three examples?
Options:
A .  Cnidaria - Bonellia, Physalia, Aurelia
B .  Platyhelminthes - Planaria, Ascaris, Taenia
C .  Mollusca - Loligo, Teredo, Octopus
D .  Porifera - Spongilla, Euplectella, Pennatula
Answer: Option C : C Loligo (squid), Teredo(shipworm) and Octopus are members of the phylum Mollusca. Physalia(portugese man of war) and Aurelia(jellyfish) are cnidarians, while Bonellia is a marine worm, considered to be a close relative of annelids. Planaria and Taenia are flatworms (platyhelminths), while Ascaris (roundworm) belongs to Phylum Aschelminthes (Nematoda). Spongilla and Euplectella are sponges (poriferans), and Pennatula (sea pen) is a cnidarian.
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