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Which one of the following is a matching set of phylum and its three examples ?
A
Cnidaria - Bonellia, Physalia, Aurelia
B
Platyhelminthes - Planaria, Schistosoma, Enterobius
C
Mollusca - Loligo, Teredo, Octopus
D
Porifera - Spongilla, Euplectella, Pennatula
Detailed Solution
Mollusca: Loligo (squid), Teredo (shipworm) and Octopus (devil fish) are all molluscs. This is a matching set.
Cnidaria: Physalia and Aurelia are cnidarians, but Bonellia is an echiuroid worm (related to annelids).
Platyhelminthes: Planaria and Schistosoma are flatworms, but Enterobius (pinworm) is a roundworm of phylum Aschelminthes.
Porifera: Spongilla and Euplectella are sponges, but Pennatula (sea pen) is a cnidarian.
So each of the other sets has one member from a different group.
The matching set is Mollusca - Loligo, Teredo, Octopus.
Cnidaria: Physalia and Aurelia are cnidarians, but Bonellia is an echiuroid worm (related to annelids).
Platyhelminthes: Planaria and Schistosoma are flatworms, but Enterobius (pinworm) is a roundworm of phylum Aschelminthes.
Porifera: Spongilla and Euplectella are sponges, but Pennatula (sea pen) is a cnidarian.
So each of the other sets has one member from a different group.
The matching set is Mollusca - Loligo, Teredo, Octopus.