Question

Sponges have no "true tissues." what does this mean

Answer 1

Sponges have cellular-level organization, meaning that that their cells are specialized so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells. This is the simplest kind of cellular organization found among parazoans.

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Answer 2

Sponges have cellular-level organization,