How are sponges classified?

Which layer in a sponge contains the choanocytes?

Which is the most complex type of sponge?

The majority of sponges are in this class.

Which is the rarest class of sponges?

These sponges have spicules made of silicon dioxide and forms 6 points.

How many cell layers are found in a sponge?

Water currents are formed inside a sponge by the

Sponges share this characteristic with other animals

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

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