Comparative Embryology Quiz 2

10 Questions | Total Attempts: 222

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Embryology Quizzes & Trivia

Questions and Answers
  • 1. 
    The primitive streak is at its full length in early gastrulation.
    • A. 

      True

    • B. 

      False

  • 2. 
    In the Hensen's node transplantation experiment, a secondary body axis developed (birds).
    • A. 

      True

    • B. 

      False

  • 3. 
    During the first week of human developent.
    • A. 

      Cleavage is occurring

    • B. 

      The embryo is moving down the oviduct to the uterus

    • C. 

      Implantation is completed

    • D. 

      A and b above

    • E. 

      All of the above

  • 4. 
    Bird embryos
    • A. 

      Undergo gastrulation via the primitive streak.

    • B. 

      Develop a blastocoel during late cleavage.

    • C. 

      Have telolecithal eggs and discoidal cleavage.

    • D. 

      A and b above

    • E. 

      All of the above

  • 5. 
    In birds, _________ is when the primitive streak is at its full length but there is no neurulation occurring yet.
    • A. 

      Late cleavage

    • B. 

      Early gastrulation

    • C. 

      Mid gastrulation

    • D. 

      Late gastrulation

    • E. 

      None of the above

  • 6. 
    For cells that enter the embryo at the primitive streak, which cell-movement process do they never use before reaching their final destination?
    • A. 

      Epiboly

    • B. 

      Involution

    • C. 

      Ingression

    • D. 

      Amoeboid movement

    • E. 

      Those cells use all of the above cell-movement processes

  • 7. 
    Koller's sickle
    • A. 

      Develops at the future posterior end of the embryo

    • B. 

      Is a site of accelerated (rapid) mitosis

    • C. 

      Is the point at which cells ingress into the blastocoel

    • D. 

      A and b above

    • E. 

      All of the above

  • 8. 
    Mammals have isolecithal eggs and radial cleavage.
    • A. 

      True

    • B. 

      False

  • 9. 
    The epiblast gives rise to
    • A. 

      Ectoderm

    • B. 

      Mesoderm

    • C. 

      Amnion

    • D. 

      A and b above

    • E. 

      All of the above

  • 10. 
    Which of the following do both birds and mammals have?
    • A. 

      Trophoblast

    • B. 

      Morula

    • C. 

      Primitive streak

    • D. 

      A and b above

    • E. 

      All of the above

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