The cells of  posterior marginal zone act as the equivalent of the amphibian Nieuwkoop center because:

A. once the PMZ has formed, it controls the other regions of the margin.

B. Cells of PMZ initiate other regions of the margin from forming their own primitive streaks.

C. the entire marginal zone produces Wnt8c (capable of inducing the accumulation of -catenin) and secrete Vg1, a member of the TGF-family.

D. The PMZ cells secretes nodal protein and Nodal activity is needed to initiate the primitive streak.

E. When placed in the anterior region of the marginal zone, a graft of PMZ tissue (posterior to and including Koller’s sickle) is able to induce wnt signaling.

Which of the following option is correct?

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#Question id: 28256

#Unit 5. Developmental Biology

 In the Sea urchin sperm and egg containing molecules are present in concentration differences manner, such as

TLS Online TPP Program

#Question id: 28257

#Unit 5. Developmental Biology

In mammalian eggs, containing thick extracellular matrix is known as

TLS Online TPP Program

#Question id: 28258

#Unit 5. Developmental Biology

A cell which is made up of the ovarian follicular cells and nurturing

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#Question id: 28259

#Unit 5. Developmental Biology

In mammalian eggs cell containing  thick extracellular matrix which analogous to the_____?_____

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#Question id: 28260

#Unit 5. Developmental Biology

 Mode of fertilization in sea urchin_______

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#Question id: 28261

#Unit 5. Developmental Biology

Two major mechanisms during fertilization in case of sea urchin, sperm attraction  and sperm activation, these mechanism is occurred ____