their weirdness
Trochophore.
yes
Gene based phylogenetic studies indicate that annelids and mollusks share a recent common ancestor
Yes.
have a trochophore
Mollusks and segmented worms have a one-way digestive system, a separate mouth and anus, and their larvae are very similar. This is the best evidence that they have a common ancestor.
This would include the ultrastructure of the cuticle. These creatures share this and many other features with the other annelids.
Trochophore
yes.. animal kingdom include,mammals,reptiles,vertebrates,mollusks,annelids,invertebrates..etc etc
Flatworms, Roundworms, Annelids, Mollusks, and Arthropods
Annelids exhibit bilateral symmetry.
Cnidarians include jellyfish and corals. Cnidarians are less complex than annelids or mollusks because the latter have gills with many layers of tissue.