The appearance of the notochord represented a milestone in Deuterostome evolution. The notochord is necessary for the development of the chordate body plan and for the formation of the vertebral column and numerous organs. It is known that the transcription factor Brachyury is required for notochord formation in all chordates. and that it controls transcription of a large number of ta... https://www.pomyslnaszycie.com/life-is-better-with-my-boys-womens-graphic-tee-ice-blue-online-now/