Podcast
Questions and Answers
What is the primary function of gastrulation in a frog embryo?
What is the primary function of gastrulation in a frog embryo?
- To establish the head-to-tail and back-to-belly axes (correct)
- To develop the placenta
- To form the neural tube
- To initiate organogenesis
During gastrulation in birds, which structure defines the anterior-posterior axis and the left and right sides of the embryo?
During gastrulation in birds, which structure defines the anterior-posterior axis and the left and right sides of the embryo?
- The yolk mass
- The primitive streak (P.S.) (correct)
- The epiblast
- Hensen's node (H.N.)
Which germ layer is formed from cells entering the lateral sides of the primitive streak in birds?
Which germ layer is formed from cells entering the lateral sides of the primitive streak in birds?
- Ectoderm
- Mesoderm
- Endoderm
- Both endoderm and mesoderm (correct)
What is the fate of cells entering Hensen's node during gastrulation in birds?
What is the fate of cells entering Hensen's node during gastrulation in birds?
Which germ layer is formed from the epiblast in birds during gastrulation?
Which germ layer is formed from the epiblast in birds during gastrulation?
As gastrulation progresses in birds, what happens to Hensen's node?
As gastrulation progresses in birds, what happens to Hensen's node?
Which statement best describes the role of the primitive streak during gastrulation in birds?
Which statement best describes the role of the primitive streak during gastrulation in birds?
Which of the following is NOT a characteristic of gastrulation in birds?
Which of the following is NOT a characteristic of gastrulation in birds?
During gastrulation in frogs, which of the following statements is correct?
During gastrulation in frogs, which of the following statements is correct?
What is the primary difference between gastrulation in birds and frogs?
What is the primary difference between gastrulation in birds and frogs?
