A sea squirt, or tunicate, is an invertebrate chordate in the subphylum Tunicata (syn Urochordata).The Phylum Chordata is characterised by having a dorsal nerve cord and a
Question
A sea squirt, or tunicate, is an invertebrate chordate in the subphylum Tunicata (syn Urochordata).The Phylum Chordata is characterised by having a dorsal nerve cord and a
Solution
notochord at some stage in their life. Sea squirts are unique because after their larval stage, where they display these chordate characteristics, they undergo a metamorphosis. During this process, they lose their notochord and dorsal nerve cord as they transition into their adult, sessile form. As adults, they attach themselves to a substrate and filter feed, looking more like sponges or corals than their chordate relatives. Despite this drastic change in form and lifestyle, they are still classified as chordates due to their larval stage.
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What is the only chordate characteristic that remains in the adult sea squirt?Multiple choice question.Dorsal tubular nerve chordPostanal tailNotochordGill slits
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The Phylum Chordata is characterised by having a dorsal nerve cord and a
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