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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
Echinodea
C
Holothuroidea
D
Crinoidea
2) Class Holothuroidea is characterized by
A
no arms, ball or disk shape
B
long thin legs, single organ set in central disk
C
upward facing mouth, long feather like arms
D
elongated body, tentacles around the mouth
3) Approximately how many different species of echinoderms exist
A
7000
B
70,000
C
70
D
700
4) Where is the mouth located on the sea star?
A
one at the end of each arm
B
top
C
bottom
5) What does echinoderm mean
A
spiny skinned
B
sea star
C
pentamerous
D
multi armed
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 oxygen to the tissues
B
carries nutrients 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
mouth
C
tube feet
D
stone canal
9) Echinoderms are
A
hetertrophs
B
autotrophs
C
omnivores
D
carnivores
10) Tube Feet are ___________ of the_________ in the____________.
A
The locomotion, nutrients, digestive glands
B
Posterior, mouth, sea star
C
Muscular extensions, canals, water vascular system
D
Metabolizers, coelemic fluid, body cavity
*select an answer for all questions
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