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How are sponges classified?
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
The majority of sponges are in this class.
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
These sponges have spicules made of silicon dioxide and forms 6 points.
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
Which of the following structures are responsible for water entering a sponge?
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
Sponges share this characteristic with other animals
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
How many cell layers are found in a sponge?
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
Water currents are formed inside a sponge by the
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
Which is the most complex type of sponge?
Hexactinella
an adult develops from a fertilized egg
Their spicules
2
Demospongae
choanocytes
ostia
Sclerospongae (Boring)
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