Which of the following animals are metamerically segmented schizocoelomates?
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a
Octopus and Aplysia
b
Nereis and Pheretima
c
Asterias and Ophiura
d
Antedon and Cucumaria
answer is B.
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Detailed Solution
Nereis and Pheretima belong to phylum Annelida (Segmented Schizocoelomates)Octopus and Aplysia belong to phylum Mollusca (Unsegmented Schizocoelomates).Antedon, Cucumaria, Asterias and Ophiura belong to phylum Echinodermata (Unsegmented Enterocoelomates).