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Chapter 26

Chapter 26. Birds. Which of the following structures is found only in birds (a) wings (b) beak ( c) four-chambered heart (d) feathers. D. Feathers. Fossils have been found that show close evolutionary links between

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Chapter 26

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  1. Chapter 26 Birds

  2. Which of the following structures is found only in birds (a) wings (b) beak (c) four-chambered heart (d) feathers

  3. D. Feathers

  4. Fossils have been found that show close evolutionary links between (a) birds and fish (b) birds and reptiles (c) birds and bats (d) birds and amphibians

  5. B birds and reptiles

  6. How are bird’s bones adapted for flight? (a) they are thin and wide (b) they are flexible (c) they are hollow (d) they are made of cartilage

  7. C they are hollow

  8. Which of the following does not have a four chambered heart? (a) Alligator (b) ostrich (c) king cobra (d) hummingbird

  9. C king cobra

  10. One importance birds have in the biosphere is that they • destroy seed crops (b) disperse seeds of some plants (c) add interesting decorations to cars (d) control the populations of deer

  11. B disperse seeds

  12. . What is the earliest known fossil with identifiable feathers? (a) Archaeopteryx (b) Pterodactyl (c)Dodo Bird (d) Pterosaurus

  13. A. Archaeopteryx

  14. What group of birds displays the greatest range of adaptations? (a) waterfowl (b) game birds (c) birds of prey (d) perching songbirds

  15. D perching songbirds

  16. Birds are called endotherms because they • generate their own body heat (b) are cold blooded (c) can survive in warm climates (d) can survive at high altitudes

  17. A. generate their own body heat

  18. Birds do not have a (a) gizzard (b) furcula (c) crop (d) urinary bladder

  19. D. urinary bladder

  20. The fused bones in bird’s skeleton eliminates the need for (a) bone marrow (b) ligaments (c) blood vessels (d) muscles

  21. B. Ligaments

  22. Which part of the amniotic egg decreases in size as the embryo grows? (a) chorion (b) allantois (c) yolk (d) Psdeopod

  23. C. Yolk

  24. An important ecological role of the hummingbirds is • dispersing seeds (b) controlling insect population (c) pollinating plants (d) disposing of dead animals

  25. C. pollinating plants

  26. What is unique about the respiratory system of birds? • Oxygen and carbon dioxide are exchanged (b) Birds lack a trachea (c) The airflow is one way (d) Birds have only one lung

  27. C. The airflow is one way

  28. Birds probably evolved from

  29. Reptiles

  30. The Triassic period was how many millions of years ago?

  31. 225

  32. The fossil record for birds is incomplete because ____________ and ____________ of birds do not fossilize well.

  33. Bones and feathers

  34. The earliest fossil animal known to have feathers was ____________.

  35. Archaeopteryx

  36. Birds evolved rapidly following the extinction of the ____________.

  37. Dinosaurs

  38. The feathers of birds may have evolved as an adaptation for retaining ________________________

  39. body heat

  40. Although they share many characteristics with reptiles, birds are the only animals that have ____________.

  41. Feathers

  42. Except for bats, birds are the only vertebrates that has ____________.

  43. Wings

  44. Birds belong the class ____________.

  45. Aves

  46. Describe three reason why some scientists feel that birds evolved from reptiles • 2 pts for each correct one, -1 for each incorrect one. • Final Questions next

  47. Scales and feathers made of same material—keratin Both have large eye sockets 4 toed foot Pubis bone inverted (one of three bones that makes the pelvic bone)

  48. Describe three structural adaptations that birds have for flight?

  49. Feathers • Hollow bones • Reproductive organs shrink when not in use • No urinary bladder • Fused bones

  50. Why must an egg shell be porous?

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