Following statements are regarding to gastrulation in chick embryo.

A. During gastrulation, future mesodermal and endodermal cells migrate from the epiblast through the primitive streak into the interior of the blastoderm.

B. An aggregation of cells, known as Hensen’s node, forms at the posterior end of the streak.

C. As the streak extends, cells of the epiblast move toward the primitive streak, through it, and then outward again underneath the surface to give rise internally to the mesoderm and endoderm, the latter displacing a lower layer of cells called the endoblast.

D. Cells that remain in the epiblast form the endoderm.

Which of the following statements are correct?

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#Question id: 13224

#Unit 6. System Physiology – Plant

Suberin is

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#Question id: 7146

#Unit 5. Developmental Biology

In Drosophila, the neuroectoderm is located ventrally during gastrulation, while in mice or frogs, the neuroectoderm is located dorsally. Which statement best describes how the two systems are similar or different?

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#Question id: 28463

#Unit 5. Developmental Biology

 First inducers of the lens are foregut endoderm and cardiac mesoderm, Foregut endoderm and cardiac mesoderm cause the synthesis of the factor in the head ectoderm during the late gastrula stage, these type of factor are____

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#Question id: 5041

#Unit 5. Developmental Biology

Which one of the following developmental processes in animals is not dependent on cellular movements?

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#Question id: 15866

#Unit 12. Applied Biology

Tissues and cells cultured in a liquid medium produce a single cells and cells clumps of few to many cells; these are called;