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Phylogenetically, sponges have evolved from what?

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Advocates of non-Porifera-first theories have made a pretty strong case that the similarities are more analogy than homology, that this is a classic case of convergent evolution. The Porifera-first people have responded by studying a broader range of choanoflagellates and studying their gene expression and development in more detail. read more

A new study reaffirms that sponges are the oldest animal phylum – and restores the classical view of early animal evolution, which recent molecular analyses had challenged. read more

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Sponges: Definition, Features and Habitat
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