Which of the following features are shared and best explains the close phylogenetic relationship between a starfish and a shark? Group of answer choices

Complete alimentary canals

Presence of a notochord

Dioecious species

Pharyngeal slits

Deuterostome development

It is the developement of deuterostomes because the animals that are deuterostomes are including those of the phyla Echinodermata (e. g., starfish, sea urchins), Chordata (e. g., sea squirts, lancelets, and vertebrates), Chaetognatha (e. g., arrowworms), and Brachiopoda (e. g., lamp shells). This includes vertebrates, so yes that's how sharks and starfish are related.