A human embryologist examines a 3- week- old embryo and notices that it has not developed a notochord. If the embryo survives, it will lack

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The notochord is a crucial structure in early embryonic development that signals the formation of the neural tube, which eventually develops into the brain and spinal cord. Without a notochord, these structures would not form properly.

A Human Embryologist Examines a 3- Week- Old Embryo and Notices