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Are poriferans unicellular, multicellular, or colonial?

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Also, does anyone know what their skeleton is like, or how they're supported? Another thing, how do they reproduce?

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  1. colonial


  2. Colonial, of course.

    Their skeletons can be either made of CO3 or SiO2

    They reproduce by budding ( asexual ) and sexually by cast sperm into the water currents, where it enters other sponges. They are hermaphrodite, though they do not self.

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