What is an Example of an Echinodermata that Does Not Have Five Arms or Five Point Radial Symmetry?
Echinoderms are a phylum of marine invertebrates that typically have five-point radial symmetry. This means that their bodies are divided into five equal parts around a central axis. However, there are a few exceptions to this rule.
One example of an echinoderm that does not have five arms or five-point radial symmetry is the sea cucumber. Sea cucumbers have an elongated, cylindrical body that is covered in a leathery skin. They have a mouth at one end of their body and an anus at the other end. They also have a number of tube feet that they use for locomotion and feeding.
Sea cucumbers belong to the class Holothuroidea, which is one of the three main classes of echinoderms. The other two classes are the Asteroidea (starfish) and the Ophiuroidea (brittle stars). All three classes of echinoderms are characterized by their unique water vascular system, which they use for locomotion, feeding, and respiration.
Here are 5 related questions and their answers:
- What is an echinoderm? An echinoderm is a marine invertebrate that typically has five-point radial symmetry.
- What is an example of an echinoderm that does not have five arms? Sea cucumbers are an example of an echinoderm that does not have five arms.
- What is the unique characteristic of echinoderms? Echinoderms are characterized by their unique water vascular system, which they use for locomotion, feeding, and respiration.
- What are the three main classes of echinoderms? The three main classes of echinoderms are the Asteroidea (starfish), the Ophiuroidea (brittle stars), and the Holothuroidea (sea cucumbers).
- What is the function of the tube feet in echinoderms? Echinoderms use their tube feet for locomotion and feeding.
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