A hypothetical organism alternates between plant and animal stages over its life cycle. The organism exhibits equally extreme sexual dimorphism.
The generations are diplobiontic a la some species of red algae: gametophyte (androphyte and gynophyte), carposporophyte (microcarpophyte and megacarpophyte) and tetrasporophyte (microtetraphyte and megatetraphyte).
The life cycle occurs like so:
- the animal-like gynophyte is fertilized by contact with the pollen of the plant-like androphyte
- the gynophyte gestates animal-like carposporophytes which consume their mother
- many carpophytes are produced by a single gynophyte and their motility allows them cover more distance
- the carposporophytes asexually gestate plant-like tetrasporophytes which eventually consume their parent and root in nearby soil
- the tetraphytes will asexually clone themselves to cover more ground
- the megatetraphyte asexually spawns motile gynophytes which may travel further away
- the microtetraphyte grows multiple androphytes which are completely dependent on their parent a la angiosperms
Is such an organism and its reproductive cycle plausible?