Vertebrates and tunicates share
  • the cyclostomes and the gnathostomes
  • an endoskeleton of calcified cartilage
  • a notochord and a dorsal, hollow nerve cord.
  • Unlike eutherians, both monotremes and marsupials
Which of the following statements about vertebrates is true?
  • The development of an amniotic egg and internal fertilization allowed vertebrates to reproduce away from water.
  • HomininsAmniotesGnathostomes
  • All deuterostomes exhibit radial symmetry in their bodies.
  • Homo sapiens is the only surviving member of a highly branched evolutionary tree of hominin species.
Which characteristic distinguishes echinoderms from the other two deuterostome lineages?
  • method of reproduction
  • Their body plan
  • adult tunicate
  • Exoskeleton
Which of the following statements describing hominin evolution is/are correct
  • All deuterostomes exhibit radial symmetry in their bodies.
  • Homo sapiens is the only surviving member of a highly branched evolutionary tree of hominin species.
  • HomininsAmniotesGnathostomes
  • The development of an amniotic egg and internal fertilization allowed vertebrates to reproduce away from water.
Which of the following statements about deuterostomes is false?
  • The development of an amniotic egg and internal fertilization allowed vertebrates to reproduce away from water.
  • HomininsAmniotesGnathostomes
  • Homo sapiens is the only surviving member of a highly branched evolutionary tree of hominin species.
  • All deuterostomes exhibit radial symmetry in their bodies.
The diagnostic feature of Chondrichthyes is _____.
  • All deuterostomes exhibit radial symmetry in their bodies.
  • Unlike eutherians, both monotremes and marsupials
  • HomininsAmniotesGnathostomes
  • an endoskeleton of calcified cartilage
Select the vertebrate taxon or taxa whose origin(s) involved duplication of Hox genes.
  • GnathostomesCraniates
  • the cyclostomes and the gnathostomes
  • Exoskeleton
  • method of reproduction
Living vertebrates can be divided into two major clades. Select the appropriate pair.
  • GnathostomesCraniates
  • the cyclostomes and the gnathostomes
  • an endoskeleton of calcified cartilage
  • All deuterostomes exhibit radial symmetry in their bodies.
Jaws evolved _____.
  • The development of an amniotic egg and internal fertilization allowed vertebrates to reproduce away from water.
  • Homo sapiens is the only surviving member of a highly branched evolutionary tree of hominin species.
  • Duplication of Hox genes made increased morphological complexity possible
  • by modification of the skeletal rods that previously supported the anterior pharyngeal gill slits
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