1. | Annelida | 2. | Platyhelminthes |
3. | Aschelminthes | 4. | Chordata |
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 |
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1. | Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming. |
2. | Nereis is dioecious. |
3. | Earthworm is monoecious. |
4. | Hirudinaria, blood-sucking leech, is an annelid that lacks true coelom and metamerism. |
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