Echinoderm Test 1/2: Question Preview (ID: 1896)


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Organisms in phylum Echinodermata are distinguished by all the following characteristics except one
a) radially symmetrical bodies b) tube feet c) bilaterally symmetrical larvae d) endoskeleton
Members of phylum Echinodermata are similar to chordates becasue
a) their larvae are bilaterally symmetrical b) they have decentralized nervous systems c) most species have no head d) all the answers are similiarities of chordates and echinoderms
Sea Lilies and feather stars are in class _________
a) Echinodea b) Holothuroidea c) Ophiuroidea d) Crinodea
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) elongated body, tentacles around the mouth d) no arms, ball or disk shape
Sea Stars are in class
a) Echinodea b) Asteroidea c) Ophiuroidea d) Holothuroidea
Class Asteroidea is characterized by
a) no arms, ball or disk shape b) five arms with equal share of organs, downward facing mouth c) long thin legs, single organ set in central disk d) elongated body, tentacles around the mouth
Brittle stars are in class
a) Ophiuroidea b) Echinodea c) Asteroidea d) Holothuroidea
Class Ophiuroidea is characterized by
a) no arms, ball or disk shape b) five arms with equal share of organs, downward facing mouth c) long thin legs, single organ set in central disk d) elongated body, tentacles around the mouth
Sand dollars and sea urchins are in class
a) Echinodea b) Holothuroidea c) Ophiuroidea d) Crinodea
Class Echinodea is characterized by
a) elongated body, tentacles around the mouth b) long thin legs, single organ set in central disk c) no arms, ball or disk shape d) upward facing mouth, long feather like arms
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