1. Which of the following features is found in the common ancestor of the deuter
ID: 321550 • Letter: 1
Question
1. Which of the following features is found in the common ancestor of the deuterostomes? Radial symmetry Notochord Pharyngeal slits 2. Which of the deuterostome groups does not display bilateral symmetry at some time during their development? Echinoderms Hemichordates Chordates None of the above 3. Which of the following deuterostome groups include species that live on land? Echinoderms Hemichordates Chordates 1. Which of the following features is found in the common ancestor of the deuterostomes? Radial symmetry Notochord Pharyngeal slitsExplanation / Answer
1. Both the hemichordata and chordata have gill slits and primitive fossil echinodermeta also show signs of gill slit . Based on above fact deuterostome evolved from common ancestor that had pharyngeal gill.
2 All deuterostome including echinoderms, hemichordates and chordates show bilateral symmetry during development.
3 chordates among deuterostome group live on land.
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