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Among living animals, only birds have_____ .
a. a cloaca c. feathers
b. amniote eggs d. a four-chambered heart
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- The ribs form from the ________. a. notochord b. neural plate c. neural tube d. somitesThe outermost germ layer in a vertebrate gastrula is the____ . a. endoderm c. mesoderm b. ectoderm d. dermisBirds are the only modern amniotes with ____. a. wings b. a four-chambered heart c. feathers d. more than one of these e. ectothermic metabolism
- A bird or feathered dinosaur is ________. a. Neornithes b. Archaeopteryx c. Enantiornithes d. PaleognathaeUnlike Archaeopteryx, modern birds have_______ . a. a long bony tail c. a two-chambered heart b. a toothless beak d. feathersAnimals like annelids and arthropodsetc where the body can be divided intoidentical left and right halves in only one plane, exhibit ________ symmetry.A. Coelenterata B. RadialC. Ctenophora D. Bilateral
- Annelids and_______ have a closed circulatory system. a. insects c. flatworms b. cephalopods d. sea starsA body cavity fully lined with tissue derived from mesoderm is called a______ . a. coelom c. complete digestive tract b. pseudocoelom d. gastrovascular cavity______include the only winged invertebrates. a. Cnidarians c. Insects b. Echinoderms d. Crustaceans
- Match each structure with its description.___ cloaca a. adjusts buoyancy___ swim bladder b. multipurpose opening___ fur or hair c. supports body___ placenta d. insulates a mammal___ endoskeleton e. waterproofs amniote skin___ keratin f. connects mother and her developing offspringAmniotes are adapted to life on land by______ . a. waterproof skin d. amniote eggs b. internal fertilization e. both a and c c. efficient kidneys f. all of the aboveBoth cartilaginous and bony fishes have______ . a. jaws d. a swim bladder b. a bony skeleton e. a four-chambered heart c. lungs f. all of the above