hi guys I need your help

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    • #18524

      I was tested today and there was a question: which cell layers are in Porifera ?
      Ive circled the one that says : 3 cell layers (epidermis endodermis and mesohyl) now I’ve been told that mesohyl isn’t a cell layer…
      so my questions are :
      how can I convince them to accept my answer?
      because I now see that poriferia doesn’t have epidermis or endodermis (it has Choanoderm and Pinacoderm) so they had a mistake?
      and why is mesohyl isn’t a cell layer?(it does contain cells)

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