OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Class Asteroidea
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Class Crinoidea
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Class Ophiuroidea
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Class Echinoidea
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Detailed explanation-1: -Echinoderms belong to the phylum Echinodermata having 5 classes namely Crinoidea (Sea lilies and Feather stars), Ophiuroidea (Brittle stars and basket stars), Asteroidea (Sea stars), Echinoidea (Sea urchins) and Holothuoidea (Sea cucumbers) (Fig. 8.11).
Detailed explanation-2: -Sea stars are in the class Asteroidea, where brittle stars are in Ophiuroidea, which also includes basket stars.
Detailed explanation-3: -Brittle Stars are part of the benthic (bottom feeding) fauna found in the marine environment. They are broadly referred to as Echinoderms, classified in the Phylum Echinodermata which are marine animals having radial symmetry with five parts, often with spines.
Detailed explanation-4: -Brittle stars belong to Class Ophiuroidea (Phylum Echinodermata) and have radial symmetry, with five elongate, skinny arms extending from their central disc, or body.