File:Origin of Vertebrates Fig 021.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:30, 9 November 2013 | ![]() | 1,745 × 876 (142 KB) | Keith Edkins | == {{int:filedesc}} == {{Information |Description={{En|Fig. 21.—A, Method of Formation of the Vertebrate Spinal Cord from the Ventral Chain of Ganglia and the Intestine of an Arthropod, represented in 1; B, Method of Formation of the Vertebrate Medul... |
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