Nutrition in sponges is

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(B) Sponges (Phylum $Porifera$) are primitive multicellular organisms that lack a specialized digestive system.They exhibit a unique water transport s

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Intracellular

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(B) Sponges (Phylum $Porifera$) are primitive multicellular organisms that lack a specialized digestive system.They exhibit a unique water transport system (canal system) where water enters through pores called $ostia$ and exits through the $osculum$.Food particles are captured by specialized cells called $choanocytes$ (collar cells) lining the internal cavities.Digestion in sponges occurs entirely within the cells after the food is engulfed by phagocytosis. Therefore,the nutrition is strictly $intracellular$.

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