Porifera Question Preview (ID: 3878)


Sponge Questions. TEACHERS: click here for quick copy question ID numbers.

How are sponges classified?
a) Their color
b) Their ostia
c) Their size
d) Their spicules

Which layer in a sponge contains the choanocytes?
a) Endodermis
b) Epidermis
c) Mesoglea
d) Both endodermis and epidermis

Which is the most complex type of sponge?
a) Calcarea
b) Hexactinella (Glass)
c) Demospongae (Bath)
d) Sclerospongae (Boring)

The majority of sponges are in this class.
a) Calcarea
b) Hexactinella
c) Demospongae
d) Sclerospongae

Which is the rarest class of sponges?
a) Calcarea
b) Hexactinella
c) Demospongae
d) Sclerospongae

These sponges have spicules made of silicon dioxide and forms 6 points.
a) Calcarea
b) Hexactinella
c) Demospongae
d) Sclerospongae

How many cell layers are found in a sponge?
a) 0
b) 1
c) 2
d) 3

Water currents are formed inside a sponge by the
a) choanocytes
b) cnidocytes
c) myocytes
d) porocytes

Sponges share this characteristic with other animals
a) cells are organized into tissues and organs
b) nerve cells
c) an adult develops from a fertilized egg
d) digetive cavity or coelenteron

Which of the following structures are responsible for water entering a sponge?
a) flagella
b) osculum
c) ostia
d) porocyte

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