There are many similarities between unilocular and plurilocular sporangia. Some of the similarities are explained below:Ectocarpus produces both types of sporangia that are unilocular and plurilocular sporangia which is a brown alga A sporophyte is a diploid body that produces both unilocular and plurilocular sporangia Both unilocular and plurilocular sporangia help in asexual reproductionBoth of these spores produce flagellated zoospores which means they have two flagella, so these spores can move.