Characteristics of Wall Lizard, Snakes, and Birds
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Questions and Answers

What is the defining characteristic of the Class Aves within the subphylum Vertebrata?

  • Development of a bony vertebral column in the adult
  • Possession of a ventral muscular heart with two, three, or four chambers (correct)
  • Lack of paired appendages
  • Presence of a notochord throughout their life

    • Why are Urochordata and Cephalochordata often referred to as protochordates?

  • They are exclusively marine organisms
  • They exhibit some primitive chordate characteristics (correct)
  • They possess a bony vertebral column
  • They lack a notochord during the embryonic period

    • How does the notochord differ between Urochordata and Cephalochordata?

  • Cephalochordata has a bony notochord, unlike Urochordata
  • Urochordata has a notochord in the head region, whereas Cephalochordata has it in the tail
  • The notochord is absent in both Urochordata and Cephalochordata
  • Urochordata has a persistent notochord throughout life, while Cephalochordata has it only in the larval tail (correct)

    • Which subphylum includes organisms that have a notochord during the embryonic period?

    <p>Vertebrata</p> Signup and view all the answers

    What replaces the notochord in adult vertebrates?

    <p>A bony vertebral column</p> Signup and view all the answers

    Which class among vertebrates bears limbs?

    <p>Class Amphibia</p> Signup and view all the answers

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