What is common amongst Marchantia, Fucus and Gracilaria?
Marchantia, Fucus and Gracilaria all of them exhibit oogamy. Marchantia have archegonia but archegonia is absent in Fucus and Gracillaria. Fucus has diplontic life cycle patter. Marchantia and Gracilaria has haplo-diplontic life cycle pattern. Marchantia, Fucus and Gracilaria does not have well developed vascular bundles.