Alternation of generations and Cenogenesis

Alternation of generations noun - The alternation of two or more different forms in the life cycle of a plant or animal.

Cenogenesis and alternation of generations are semantically related. In some cases you can replace term "Cenogenesis" with "Alternation of generations", this terms are similar.

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).

Alternation of generations and cenogenesis are semantically related. You can use "Alternation of generations" instead a noun "Cenogenesis".