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Animal Development and Reproduction Quiz

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Animal Development and Reproduction Quiz

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Questions and Answers

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?

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?

Ectoderm

Mesoderm

Endoderm

Both endoderm and mesoderm (correct)

What is the fate of cells entering Hensen's node during gastrulation in birds?

They form the head and notochord Signup and view all the answers

Which germ layer is formed from the epiblast in birds during gastrulation?

Ectoderm Signup and view all the answers

As gastrulation progresses in birds, what happens to Hensen's node?

It moves towards the posterior end Signup and view all the answers

Which statement best describes the role of the primitive streak during gastrulation in birds?

It defines the axes and layers of the embryo Signup and view all the answers

Which of the following is NOT a characteristic of gastrulation in birds?

It is unaffected by the large amount of yolk in the egg Signup and view all the answers

During gastrulation in frogs, which of the following statements is correct?

It requires coordination of remarkable cell movements Signup and view all the answers

What is the primary difference between gastrulation in birds and frogs?

The presence of a large amount of yolk in bird eggs affects gastrulation Signup and view all the answers