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