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)