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