Injection of an odorant molecule into a frog egg causes the adult to seek that odor in food.

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• How do the molecular events brought on by injecting a frog's egg with an odorant molecule become expanded into a nervous system architecture which controls muscles to behaviorally seek out that odorant as an adult frog?question0.875
  Rhetorical question highlighting the gap between molecular triggers and system-level outcomes.
• Ectopic eyes formed in frog embryo tails still function; eye primordia cells succeed in forming an eye, optic nerve, and correct neural connections despite abnormal spatial context.finding0.722
• Misexpression of a single ion channel induces complete ectopic eye formation in gut endoderm of vertebrates.finding0.720
  Setting cells to an eye-like bioelectric prepattern via ion channel manipulation creates fully formed eyes in abnormal locations, where the master gene Pax6 is insufficient.
• Voltage-induced ectopic eye formation in tadpolesfinding0.716
• In frog embryo development, each transformation introduces new structure in the form of new asymmetrically placed local symmetries inducing new layers of differentiation without dispersing the underlying deep structure.finding0.711
  Embryological finding showing the specific mechanism — insertion of new local symmetries — by which wholeness is preserved and extended in biological development
• Tadpoles achieve normal frog faces despite organ misplacementfinding0.707
  Empirical example of regulative development: when craniofacial organs are positioned abnormally, they reposition via non-natural paths until correct frog face is achieved.
• Artificially induced frog leg regeneration follows a non-developmental path (like a plant) to produce a normal limb.finding0.705
  Frog legs regenerated after specific induction did not form a paddle with interdigital apoptosis but grew digits from a central core, reaching correct final form via atypical intermediate states.
• A simple voltage state imposed on somatic cells can induce them to build a complete vertebrate eye.finding0.702
  Pai et al. 2012 finding on bioelectric control of eye formation.