Which of the Following Is an Example of How an Echinoderm

question 143

Multiple Choice

Which of the following is an example of how an echinoderm uses its tube feet to feed?

• A) Crinoids capture food particles in mucus secreted by the tube feet.
• B) Brittle stars use their tube feet to scrape algae from rocks.
• C) Sea stars filter phytoplankton from the water.
• D) Sea urchins grasp and gradually exhaust the shell muscles of bivalves.
• E) Sea cucumbers capture food with their posterior tube feet and pass it toward the mouth.

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