OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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____ stars are echinoderms that live under rocks on the ocean floor. They will break off an arm as a method of defense when they feel threatened.
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Shiny
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Brittle
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Sea
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None of the above
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Explanation:
Detailed explanation-1: -The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers). The most well-known echinoderms are members of class Asteroidea, or sea stars.
Detailed explanation-2: -Sea stars are in the class Asteroidea, where brittle stars are in Ophiuroidea, which also includes basket stars. To tell the two apart, first look at their bodies. Their fundamental structure is different, especially when you look at where the arms connect to the center of the body.
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