Which of the following is NOT an echinoderm?

Explore the Diversity of Life Test. Challenge your understanding with multiple-choice questions and learn with instant feedback. Prep for the exam and gain insights on living organisms!

Multiple Choice

Which of the following is NOT an echinoderm?

Explanation:
Recognizing echinoderms relies on shared features like fivefold symmetry as adults, a water vascular system with tube feet, and a calcareous endoskeleton. Starfish, sea urchins, and sand dollars all exhibit these traits, so they are echinoderms. The octopus, on the other hand, is a mollusk with bilateral symmetry, a soft body, and different modes of movement that do not involve a water vascular system or tube feet. It does not share the defining echinoderm features, so it is not an echinoderm.

Recognizing echinoderms relies on shared features like fivefold symmetry as adults, a water vascular system with tube feet, and a calcareous endoskeleton. Starfish, sea urchins, and sand dollars all exhibit these traits, so they are echinoderms. The octopus, on the other hand, is a mollusk with bilateral symmetry, a soft body, and different modes of movement that do not involve a water vascular system or tube feet. It does not share the defining echinoderm features, so it is not an echinoderm.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy