பொருள் : Introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution).
ஒத்த சொற்கள் : caenogenesis, cainogenesis, cenogenesis, kenogenesis
Emergence during embryonic development of various characters or structures that appeared during the evolutionary history of the strain or species.
palingenesis, recapitulation