Which of the following statements is true for | vedclass

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(B) Sponges (Phylum $Porifera$) are characterized by the presence of a water transport or canal system. $1$. They possess flagellated collar cells,als

Vedclass · Accepted Answer

They possess flagellated collar cells (choanocytes).

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(B) Sponges (Phylum $Porifera$) are characterized by the presence of a water transport or canal system. $1$. They possess flagellated collar cells,also known as $choanocytes$,which line the spongocoel and the canals. This is a defining feature of all sponges. $2$. Option $A$ is incorrect because some sponges,like $Spongilla$,are freshwater. $3$. Option $C$ is incorrect because the skeleton varies; some have only spicules,some only spongin fibers,and some have neither. $4$. Option $D$ is incorrect because while many reproduce by budding,it is not a universal feature for all species in the phylum.

Which of the following statements is true for all sponges,without exception?

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