Which of the Following Are Elongated in the Oral-Aboral Axis

question 27

Multiple Choice

Which of the following are elongated in the oral-aboral axis?

• A)class Crinoidea (sea lilies and feather stars)
• B)class Asteroidea (sea stars)
• C)class Ophiuroidea (brittle stars)
• D)class Echinoidea (sea urchins and sand dollars)
• E)class Holothuroidea (sea cucumbers)

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