Echinodermata
Wednesday, April 18, 2007
Diversity
sea star (class Asteroidea)
sea urchin & sand dollar
(class Echinoidea)
feather star (class Crinoidea)
sea cucumber (class Holothuroidea)
brittle star (class Ophiuroidea)
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Work cited
Facts
Diversity
Reproduction
Movement & Response
Respiration
Feeding & Excretion
Internal Transport
Introduction
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