Question

For instance, could the first metazoan have been the penetration of an entrepreneurial sperm-like choanozoan into the single-celled body of another, genetically similar enough, holozoan? a holozoan, perhaps similar to pluriformea or ichthyosporea?

Answer 1

The first metazoan likely evolved from a single-celled state to a multicellular one, with the development of true differentiated tissues known as Eumetazoa. Current understanding suggests that Metazoa evolved from a common ancestor resembling choanoflagellates, which are single-celled protists similar to the feeding cells of sponges.

Step-by-step explanation:

The question is asking about the possibility of the first metazoan arising from the penetration of an entrepreneurial sperm-like choanozoan into a genetically similar holozoan. While the exact origin of multicellularity is still debated, current understanding suggests that Metazoa evolved from a common ancestor resembling choanoflagellates, which are single-celled protists similar to the feeding cells of sponges. The evolution of the first metazoan involved the transition from a single-celled state to a multicellular one, with the development of true differentiated tissues known as Eumetazoa.