A zoologist is investigating an unidentified marine animal specimen. They note that this creature has radial symmetry along its short axis, but has bilateral symmetry in a perpendicular axial plane. In addition, its peripheral surface appears to have several lines of cilia used for movement in the water. Which phylum is most likely to contain this specimen? Group of answer choices A. Annelida B. Mollusca C. Cnidaria D. Ctenophora

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A: Stalked Jellyfishes are the sole living members of Class Staurozoa.

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A: Chaetognaths are phylum of the predatory marine worms.

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A: Please follow step 2 for detailed explanation.

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Q: One example of Cephalopoda is Select one: a. squids b. snails C. slugs O d. clams

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Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.