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Sponges consist of two cell layers surrounding an acellular (having no cells) gel layer called the mesohyl or mesenchyme.
2 cell layers
doesnt apply
two
there are 2 layers. one for each side. like a sandwich and the layers are the bread. there are two of them so they can hold together the inside :]
there are 2 layers. one for each side. like a sandwich and the layers are the bread. there are two of them so they can hold together the inside :]
4 - counting the cuticle, without it it is just 2
forty-six layers
there are two layers inner and outer layer of a blood cell.......
71 microscopic layers
2 layers of lipids.
2 layers
3
there are three
2