Cenogenesis and Kainogenesis

Cenogenesis noun - 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).

Kainogenesis is a synonym for cenogenesis. In some cases you can use "Kainogenesis" instead a noun "Cenogenesis".

Kainogenesis noun - 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).

Cenogenesis is a synonym for kainogenesis. You can use "Cenogenesis" instead a noun "Kainogenesis".