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Porifera
Test Description: Sponge questions
Instructions: Answer all questions to get your test result.
1) How are sponges classified?
A
Their color
B
Their ostia
C
Their size
D
Their spicules
2) Which layer in a sponge contains the choanocytes?
A
Mesoglea
B
Both endodermis and epidermis
C
Endodermis
D
Epidermis
3) Which is the most complex type of sponge?
A
Sclerospongae (Boring)
B
Hexactinella (Glass)
C
Calcarea
D
Demospongae (Bath)
4) The majority of sponges are in this class.
A
Demospongae
B
Hexactinella
C
Calcarea
D
Sclerospongae
5) Which is the rarest class of sponges?
A
Hexactinella
B
Calcarea
C
Demospongae
D
Sclerospongae
6) These sponges have spicules made of silicon dioxide and forms 6 points.
A
Sclerospongae
B
Calcarea
C
Hexactinella
D
Demospongae
7) How many cell layers are found in a sponge?
A
2
B
3
C
1
D
0
8) Water currents are formed inside a sponge by the
A
porocytes
B
cnidocytes
C
myocytes
D
choanocytes
9) Sponges share this characteristic with other animals
A
digetive cavity or coelenteron
B
nerve cells
C
cells are organized into tissues and organs
D
an adult develops from a fertilized egg
10) Which of the following structures are responsible for water entering a sponge?
A
porocyte
B
flagella
C
ostia
D
osculum
*select an answer for all questions
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