This undifferentiated embryonic structure then undergoes a phase of major cell migration called gastrulation, producing a gastrula with three separate germ layers: the endoderm, mesoderm, and ectoderm. Endoderm The endoderm is formed from cells that migrate toward the center of the developing gastrula.
The Eiffel tower is made of puddled iron. It is made up of steel in steel X's. The Eiffel Tower is made of iron. The Eiffel Tower is made of pure iron.
The Eiffel Tower is an iron lattice tower located in Paris, France, and is one of the most well known landmarks in the world. The tower was completed in 1889. It serves as aâ¦ tourist attraction, a venue for observations of the city of Paris, and as a location for TV and radio broadcast antennae.