Metamerism evolved for the first time in the members of the Phylum:
1. Annelida 2. Platyhelminthes
3. Aschelminthes 4. Chordata
Subtopic:  Phylum Annelida |
 89%

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Unlike Arthropods, Annelids:
1. have a true coelom lined by embryonic mesoderm
2. have a closed circulatory system
3. do not reproduce by sexual methods
4. have a complete digestive system
Subtopic:  Phylum Annelida |
 82%
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