Echinoderms are named so due to presence of____________.
A
Arms
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B
Spines
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C
Pedicellariae
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D
Tube feet
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Solution
The correct option is B Spines
The word “echinoderm” is derived from the Greek “echinos,” meaning spiny, and “derma,” meaning skin. The skin of most species is covered by spines, “warts,” or other projections. When first seeing an echinoderm, most people think that the skin is tough because in many species the skin looks tough, as the skin in many species is surprisingly delicate.