Question

Explain how all echinoderms show five-sided radial symmetry when they look so different.

Answer 1

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Step-by-step explanation:

Answer 2

• Sea cucumbers are echinoderms, a phylum that includes sea urchins and starfish.
• Echinoderms have a five-way radial symmetry, a pattern most familiar in the shape of the starfish.
• In sea cucumbers this character is shown in the five strips of muscle inside the body wall, running from the front to the back.
• The organism was motile and bilateral in symmetry.
• Bilateral symmetry means the organism can be cut right down the middle and be split into two equal halves.
• The echinoderm ancestry later developed radial symmetry as it was thought to be more advantageous to the species

Step-by-step explanation:

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