Figure 1-36. Comparison of the embryonic development of a fish, an amphibian, a reptile, a bird, and a selection of mammals.

Figure 1-36Comparison of the embryonic development of a fish, an amphibian, a reptile, a bird, and a selection of mammals

The early stages (above) are very similar; the later stages (below) are more divergent. The earliest stages are drawn roughly to scale; the later stages are not. (From E. Haeckel, Anthropogenie, oder Entwickel-ungsgeschichte des Menschen. Leipzig: Engelmann, 1874. Courtesy of the Bodleian Library, Oxford.)

From: From Single Cells to Multicellular Organisms

Cover of Molecular Biology of the Cell
Molecular Biology of the Cell. 3rd edition.
Alberts B, Bray D, Lewis J, et al.
New York: Garland Science; 1994.
Copyright © 1994, Bruce Alberts, Dennis Bray, Julian Lewis, Martin Raff, Keith Roberts, and James D Watson.

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