Spemann's organizer c. None of the above 5. In the following statements, either three are correct and one is false, or three are false and one is correct. Pick the one odd statement, be it correct or false, and circle the respective letter. The potency of the marginal blastula cells to form mesodermal structures is acquired gradually during cleavage.
Animal cells induce their vegetal neighbors to form mesoderm.
Dorsal vegetal blastomeres induces neighboring equatorial cells to form notochord. Dorsal equatorial cells induce their lateral neighbors to form intermediate mesoderm. Promoters and enhancers are bound specifically by transcription factors. Trans-activating factors enable the transcription factor to interact with proteins that bind RNA polymerase. All cells of an organism contain the same mixture of transcription factors.