Degenerate eumetazoans-consensus phylogenies indicate

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J. H Ma (2017) and others have written that it is not possible to tell whether sponges are degenerate Eumetazoans or as consensus phylogenies indicate, sponges share common ancestors with basal Metazoans.

a) What characters do sponges and radiates like Hydra have in common, that is putatively ancestral characters.

b) Why are radiates like Hydra thought to be derived from Metazoans like Calcareous sponges?

c) Describe a scenario where a Radiate evolves into a Metazoan sponge.

Reference no: EM132734788

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