Porifera

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The majority of sponges are in this class.

Which of the following structures are responsible for water entering a sponge?

Sponges share this characteristic with other animals

Which is the rarest class of sponges?

Which layer in a sponge contains the choanocytes?

How are sponges classified?

How many cell layers are found in a sponge?

Which is the most complex type of sponge?