Scelta multipla
What type of symmetry is characteristic of adult echinoderms?
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31. Invertebrates
Echinoderms
Scelta multipla
Which of the following is a distinctive feature of all echinoderms?
A
Segmented body
B
Exoskeleton
C
Bilateral symmetry
D
Radial symmetry
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Understand the characteristics of echinoderms: Echinoderms are a group of marine animals that include starfish, sea urchins, and sea cucumbers. They are known for their unique features.
Identify the distinctive feature: Echinoderms are characterized by their radial symmetry, which means their body parts are arranged around a central axis. This is a key feature that distinguishes them from other animal groups.
Differentiate from other features: While some animals have segmented bodies or exoskeletons, echinoderms do not. They have an endoskeleton made of calcareous plates.
Clarify symmetry types: Bilateral symmetry is when an organism can be divided into two identical halves along a single plane. Echinoderms exhibit radial symmetry, especially in their adult form, which is different from bilateral symmetry.
Conclude with the correct feature: Based on the characteristics of echinoderms, radial symmetry is the distinctive feature that applies to all members of this group.
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