OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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This is the class known for its representing organisms:Sea lilies and feather stars
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Class Asteroidea
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Class Echinoidea
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Class Holothuroidea
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Class Crinoidea
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Explanation:
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: -Like sea stars, the feather stars and sea lilies (class Crinoidea) have arms, but the oral surface faces up, away from the bottom (Fig. 3.83 E). The tube feet extend upward from the oral surface to capture particles of food floating by.
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