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Echinderm Test 2/2
Test Description: Mzrine Bio
Instructions: Answer all questions to get your test result.
1) Sea cucumber are in class
A
Ophiuroidea
B
Holothuroidea
C
Echinodea
D
Crinoidea
2) Class Holothuroidea is characterized by
A
long thin legs, single organ set in central disk
B
upward facing mouth, long feather like arms
C
elongated body, tentacles around the mouth
D
no arms, ball or disk shape
3) Approximately how many different species of echinoderms exist
A
70
B
7000
C
700
D
70,000
4) Where is the mouth located on the sea star?
A
bottom
B
one at the end of each arm
C
top
5) What does echinoderm mean
A
spiny skinned
B
multi armed
C
pentamerous
D
sea star
6) What kind of skeleton does an sea star have
A
hytdrostatic
B
exoskeleton
C
endoskeleton
7) what is the function of the coelemic fluid
A
carries nutrients to the tissues
B
carries oxygen to the tissues
C
carries nutrients and oxygen to the tissues
8) where does water enter the water vascular system in a sea star
A
madraporite
B
tube feet
C
mouth
D
stone canal
9) Echinoderms are
A
carnivores
B
omnivores
C
hetertrophs
D
autotrophs
10) Tube Feet are ___________ of the_________ in the____________.
A
Posterior, mouth, sea star
B
Metabolizers, coelemic fluid, body cavity
C
Muscular extensions, canals, water vascular system
D
The locomotion, nutrients, digestive glands
*select an answer for all questions
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