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Gastrulation begins with the formation of the primitive streak on the surface of the hypoblast.
Gastrulation begins with the formation of the primitive streak on the surface of the hypoblast.
False
The primitive streak is clearly visible as a narrow groove in a 15- to 16-day embryo.
The primitive streak is clearly visible as a narrow groove in a 15- to 16-day embryo.
True
Cell migration and specification during gastrulation are controlled by fibroblast growth factor 8.
Cell migration and specification during gastrulation are controlled by fibroblast growth factor 8.
True
The cephalic end of the primitive streak is known as the primitive node.
The cephalic end of the primitive streak is known as the primitive node.
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FGF8 controls cell movement by upregulating E-cadherin, a protein that normally binds epiblast cells together.
FGF8 controls cell movement by upregulating E-cadherin, a protein that normally binds epiblast cells together.
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