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- Which structure(s) occur ONLY in chordata? (check all of which are true) A. NotochordB. Dorsal hollow nerve cordC. EndostyleTorsion is a unique characteristic of the a. bivalves. b. gastropods. c. chitons. d. cephalopods.Which of the following features does not distinguish humans as a member of phylum Chordata? a. Human embryos undergo indeterminate cleavage. b. A spinal cord runs along an adult human’s dorsal side. c. Human embryos exhibit pharyngeal arches and gill slits. d. The human coccyx forms from an embryonic tail.
- Which of the following is a derived trait of chordates? A. Endoskeleton B. Dorsal nerve cord C. Skull and vertebrae D. Muscular post-anal tail E. None of the aboveWhich of the following statements about bilaterian animals is false? A. Many bilaterians are invertebrates but some are not. B. All bilaterians are triploblastic (have three germ layers). C. All bilaterians have bilateral symmetry. D. Most bilaterians have tissues but some do not.What is a key characteristic of all arthropods?a. Six legsb. Pseudocoelomc. Mandiblesd. Exoskeleton
- What shared characteristic supports the surprisingly close relationshipbetween echinoderms and chordates?a. Deuterostomyb. Bilateral symmetryc. Multicellularityd. Presence of a notochordThe presence of a bony skeleton, an operculum, and a swim bladder areall defining characteristics ofa. Myxini. b. lampreys. c. Chondrichthyes. d. bony fishes. e. amphibians.Which of the following animals show the characteristics required to be a chordate? A. Tunicates such as Mogula sp. B. Lancelets such as Branchiostoma sp. C. Vertebrates such as lithobates/Rana sp. D. A and B only E. A,B, and C only
- Match the benefit to the correct chordate adaptation. (match each number to the correct letter) 1. allows organisms to walk on land 2. allows organisms to lay eggs on land, without water 3. allows organisms to generate their own heat 4. provides a rigid structure for muscles A.bony skeleton B. Ectotherm C. Tetrapod D. Amniotic eggs E. Endotherm F. SeedsFigure 15.33 Which of the following statements about common features of chordates is true?a. The dorsal hollow nerve cord is part of the chordate central nervous system.b. In vertebrate fishes, the pharyngeal slits become the gills.c. Humans are not chordates because humans do not have a tail.d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.Each of the following is a critical difference between protostomes and deuterostomes except A. deuterostomes have bilateral symmetry B. the blastopore becomes the anus in deuterostomes C. the blastopore becomes the mouth in protostomes D. protostomes have radial symmetry
