10 Questions
What is the primary function of gastrulation in a frog embryo?
To establish the head-to-tail and back-to-belly axes
During gastrulation in birds, which structure defines the anterior-posterior axis and the left and right sides of the embryo?
The primitive streak (P.S.)
Which germ layer is formed from cells entering the lateral sides of the primitive streak in birds?
Both endoderm and mesoderm
What is the fate of cells entering Hensen's node during gastrulation in birds?
They form the head and notochord
Which germ layer is formed from the epiblast in birds during gastrulation?
Ectoderm
As gastrulation progresses in birds, what happens to Hensen's node?
It moves towards the posterior end
Which statement best describes the role of the primitive streak during gastrulation in birds?
It defines the axes and layers of the embryo
Which of the following is NOT a characteristic of gastrulation in birds?
It is unaffected by the large amount of yolk in the egg
During gastrulation in frogs, which of the following statements is correct?
It requires coordination of remarkable cell movements
What is the primary difference between gastrulation in birds and frogs?
The presence of a large amount of yolk in bird eggs affects gastrulation
Test your knowledge on the process of animal development starting from fertilization to the formation of adult tissues, followed by gametogenesis and fertilization. Learn about the stages such as cleavage, gastrulation, and organogenesis.
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