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Problems of Gastrulation: Real and Verbal

William W. Ballard
BioScience
Vol. 26, No. 1 (Jan., 1976), pp. 36-39
DOI: 10.2307/1297297
Stable URL: http://www.jstor.org/stable/1297297
Page Count: 4
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Problems of Gastrulation: Real and Verbal
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Abstract

Conclusions about the fate maps and morphogenetic movements of vertebrate embryos seem to be unduly influenced by antique homologic theory. Diversities within the phylum, greater than usually admitted, could extend to the behavior of individual moving cells and the factors generating and controlling that movement.

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