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Echinoderm Test 1/2
Test Description: Sea star
Instructions: Answer all questions to get your test result.
1) Organisms in phylum Echinodermata are distinguished by all the following characteristics except one
A
tube feet
B
bilaterally symmetrical larvae
C
radially symmetrical bodies
D
endoskeleton
2) Members of phylum Echinodermata are similar to chordates becasue
A
they have decentralized nervous systems
B
most species have no head
C
their larvae are bilaterally symmetrical
D
all the answers are similiarities of chordates and echinoderms
3) Sea Lilies and feather stars are in class _________
A
Echinodea
B
Crinodea
C
Ophiuroidea
D
Holothuroidea
4) Class Crinodea is characterized by _______ and _______
A
upward facing mouth, long feather like arms
B
long thin legs, single organ set in central disk
C
no arms, ball or disk shape
D
elongated body, tentacles around the mouth
5) Sea Stars are in class
A
Holothuroidea
B
Echinodea
C
Asteroidea
D
Ophiuroidea
6) Class Asteroidea is characterized by
A
no arms, ball or disk shape
B
long thin legs, single organ set in central disk
C
elongated body, tentacles around the mouth
D
five arms with equal share of organs, downward facing mouth
7) Brittle stars are in class
A
Echinodea
B
Asteroidea
C
Holothuroidea
D
Ophiuroidea
8) Class Ophiuroidea is characterized by
A
no arms, ball or disk shape
B
elongated body, tentacles around the mouth
C
five arms with equal share of organs, downward facing mouth
D
long thin legs, single organ set in central disk
9) Sand dollars and sea urchins are in class
A
Ophiuroidea
B
Holothuroidea
C
Echinodea
D
Crinodea
10) Class Echinodea is characterized by
A
upward facing mouth, long feather like arms
B
no arms, ball or disk shape
C
long thin legs, single organ set in central disk
D
elongated body, tentacles around the mouth
*select an answer for all questions
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