The true nucleus is not a homologous feature of Phylum Porifera. So, it's B.
Porifera may be defined as superficial invertebrate animals that live in aquatic habitats that comprise the sponges.
Organisms belonging to animals, plants, and fungi only have a true nucleus. The members of the phylum Porifera majorly consist of sponges that have a system of suspension feeders that filter food out of the water.
The members of the phylum Porifera have choanocytes that specify the cells that sweep water into the body.
Therefore, the correct option for this question is B.
To learn more about the phylum Porifera, refer to the link:
https://brainly.com/question/13663064
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