| 31. | In the absence of these signals, ectoderm reverts to its default state of neural tissue.
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| 32. | Sox2 inhibits differentiation into the mesendoderm germ layer and promotes differentiation into neural ectoderm germ layer.
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| 33. | The cellular tissues that ultimately become teeth originate from the embryonic germ layer, the ectoderm.
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| 34. | The tentacles bear stinging nematocytes on the outer half of the ectoderm ( outside layer ).
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| 35. | These cells are in contact with the outer ectoderm cells, which will eventually become the lens.
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| 36. | During development, definitive endoderm and ectoderm differentiates into several gastrointestinal epithelial lineages, including endocrine cells.
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| 37. | One group of cells fated to become melanocytes migrates dorsolaterally into the ectoderm towards the ventral midline.
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| 38. | By the upward growth of the mesoderm the neural tube is ultimately separated from the overlying ectoderm.
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| 39. | These anomalies are thought to reflect changes in the brain as both are derived from the ectoderm.
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| 40. | The ectospermalege is derived from the ectoderm . into the groove, and pierce the pleural membrane.
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