Why poriferans don't have nervous tissue?
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Poriferans are the most primitive animals of animal kingdom, they possess only cell aggregate level of organisation, they are the simplest multicellular organism. Hence , they do not have a nervous tissue but can possess a simple ganglia
TheLegend31:
is there any other reason except this??
I don't think so
ohk.. tnqqq
May be it can... Just because they don't have neurons...
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