Echinoderms and Chordates 0.0 / 5 ? BiologyEchinoderms and ChordatesUniversityNone Created by: ppogbaCreated on: 11-07-19 16:35 What are the 2 Deuterostrome phyla? Phylum Echinodermata and Phylum Chordata. 1 of 17 What would be found in phylum echinodermata and how many species? starfish, sea urchins, brittle stars. 7000 species. 2 of 17 What is the class from phylum echinodermata that contains starfish? Class Asteroidea 3 of 17 What class from phylum echinodermata contains brittle stars? Class Ophiuroidea. 4 of 17 What does class Echinoidea from phylum echinodermata contain? sea urchins/ sand dollars 5 of 17 What class from phylum echinodermata contains sea lilies/ feather stars? Class Crinoidea 6 of 17 Class Holothuroidea from phylum echinodermata contains what? sea cucumbers 7 of 17 What class from phylum echinodermata contains sea daisies? Class Concentricycloidea 8 of 17 What is a Notochord? a long, flexible rod that lies between digestive tract and nerve cord in embryo, skeletal support. 9 of 17 Give 4 characteristics of Phylum Chordata Notochord, dorsal hollow nerve chord, pharyngeal slits and muscular post-anal tail. 10 of 17 Name the 3 subphyla of phylum Chordata. Subphylum Urochordata, subphylum Cephalochordata, subphylum Vertebrata. 11 of 17 What would be found in subphylum Urochordata tunicates or 'sea squirts'. 12 of 17 What would subphylum cephalochordate contain? lancelets, branchiostoma ('gill mouth'). 13 of 17 What does molecular evidence suggest about cephalochordates? They are our closest invertebrate relatives. 14 of 17 What is paedogenesis? sexual maturity in the larva 15 of 17 Where may cephalochordates and vertebrates have evolved from? from the larval form of a urochordate by paedogenesis. 16 of 17 How many species in subphylum Vertebrata. How many years ago did they first appear in fossil record? 40,000 species. 550 mya. 17 of 17
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