All vertebrate embryos follow a common developmental path due to their common ancestry. All have a set of very similar genes (the homeobox genes) that define their basic body plan. As they grow, the ...
VERTEBRATE ZOOLOGY AN INTRODUCTION TO THE COMPARATIVE ANATOMY EMBRYOLOGY AND EVOLUTION OF CHORDATE ANIMALS BY GR DE BEER WITH AN INTRODUCTION BY JULIAN S HUXLEY ...
An Introduction to the Comparative Anatomy, Embryology and Evolution of Chordate Animals. By Dr. G. R. de Beer. (Text-Books of Animal Biology.) New edition. Pp. xv ...
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