Sponges (phylum: Porifera)are animals that possess feeding cells called collar cells.These cells have a central flagellum surrounded by a collar of microvilli.The collar filters organic matter out of the water column.Which protist shares a more recent common ancestor with the poriferans?

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Quizplus · Accepted Answer

Choanoflagellates share many morphological and genetic similarities with the collar cells of sponges, leading to the hypothesis that they are the closest living relatives of poriferans. Ciliates, Rhodophyta, Radiolarians, and Myxomycota do not share as close of a relationship with poriferans.

Sponges (Phylum: Porifera)are Animals That Possess Feeding Cells Called Collar