Avian Morphology II

5 Questions

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Morphology Quizzes & Trivia

Questions and Answers
  • 1. 
    Vision is the principle mode of food location for most birds, and one of the key structures of the eye is the cornea. The cornea
    • A. 

      Is transparent and allows light into eye.

    • B. 

      Contains smooth muscle fibres and encircles the opening or pupil.

    • C. 

      Regulates the light passing through to the retina

    • D. 

      Is an odd vascular choroid body thought to nourish the retina and control pH.

    • E. 

      Is a depression in the retina that contains a high concentration of cone cells.

  • 2. 
    The visual fields of the American woodcock (Scolopax minor) overlap at the anterior extent of their range, and at the posterior extent of the range. This means that the American woodcock has a 360 degree field of vision and has binocular vision both in front and behind the head.
    • A. 

      True

    • B. 

      False

  • 3. 
    Which of the following type of molecules is NOT a pigment found in feathers:
    • A. 

      Anthocyanins.

    • B. 

      Carotenoids.

    • C. 

      Melanins.

    • D. 

      Porphyrins.

    • E. 

      Psittacofulvins.

  • 4. 
    The vocal structure responsible for sound production in many birds, formed by modifications of tracheal rings or bronchial half-rings, is called a
    • A. 

      Beat box.

    • B. 

      Phalanx.

    • C. 

      Pharynx.

    • D. 

      Syringe.

    • E. 

      Syrinx.

  • 5. 
    Avian respiration is a highly derived system compared with the respiration of other sauropsids. Birds retain faveolus lungs but have novel air sac structures throughout the body. The role of air sacs in respiration is to
    • A. 

      Provide additional gas exchange surfaces.

    • B. 

      Hold air only during an inhalation.

    • C. 

      Hold air only during an exhalation.

    • D. 

      Hold air during both inhalation and exhalation.

    • E. 

      Do nothing. The air sacs have no physiological function.