Which observation is inconsistent with Haeckel's idea that "ontogeny recapitulates phylogeny"?
A. The pharyngeal clefts and branchial arches of embryonic mammals and reptiles never acquire the form seen in adult fish.
B. All tetrapod embryos display pharyngeal clefts, a notochord, segmentation, and paddlelike limb buds.
C. Snakes and legless lizards develop "leg buds" as embryos, only to have them reabsorbed prior to hatching.
D. In reptile embryos, two bones develop into the articular bones of the hinge of the jaw, while these same bones become the hammer and anvil of the inner ear in marsupials.
E. The backbone
Ans: A. The pharyngeal clefts and branchial arches of embryonic mammals and reptiles never acquire the form seen in adult fish.
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