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