出典:Wiktionary
出典:『Wiktionary』 (2026/03/08 22:47 UTC 版)
caenogenesis (countable and uncountable, plural caenogeneses)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/18 14:01 UTC 版)
Caenogenesis (also variously spelled cainogenesis, cenogenesis, kainogenesis, kenogenesis) is the introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species, as opposed to palingenesis. Notable examples include the addition of the placenta in mammals.