Question

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6. What is the correct evolutionary pathway for the key features of chordates! A. notochord - vertebrae-jaws - bony skeleton - lungs - 4 limbs - amniotic C66- mammary glands B. vertebrae - notochord- jaws - bony skeleton - lungs - 4 limbs - amniotic egg - mammary glands C. notochord - vertebrae-jaws - bony skeleton - lungs - amniotic egg - 4 limbs - mammary glands D. notochord - vertebrae - jaws - bony skeleton - mammary glands - lungs - 4 limbs- amniotic egg E. mammary glands - notochord - vertebrae - jaws - lungs - 4 limbs - amniotic egg - bony skeleton 7. Amphibians most likely evolved from ancestors most similar to the A. hagfish. B. lamprey. C. coelacanth D. skate. E. ray-finned fish. 8. Which of these characteristics is NOT found in the amphibians but is developed in reptiles? A. thin, moist skin B. internal fertilization C. small, inefficient lungs D. aquatic larvae E. eggs with gelatinous covering 9. Which of these characteristics is NOT associated with flight requirements in birds? A. feet with claws B. light, hollow bones C. a light, horny beak with no teeth D. respiratory air sacs and lungs with one-way air flow E. an enlarged breastbone with strong muscles attached 10. Which of the following statements is NOT correct about the flatworms? A. There are three complete tissue layers. B. Flatworms may be either free living or parasitic. C. Flatworms have a sac body plan, with only a mouth and no anus. D. Parasitic flatworms have a well-developed head with eyespots and nerves concentrated into a brain. E. Most planaria are found in marine environments, but some dwell in freshwater and moist terrestrial environments.

Answer 1

Answers:

6. A: notochord-vertebrae-jaws-bony skeleton-lungs-4 limbs-amniotic egg-mammary glands

7. C: coelacanth

8. C: small, inefficient lungs.

9. A: feet with claws

10. D: Parasitic flatworms have a well-developed head with eyespots and nerves concentrated into a brain.