Question
During a Zoology practical, a sea urchin test is made of hard internal plates beneath the skin. Select the most accurate identification.
Correct Answer: C
endoskeleton of calcareous ossicles
Echinoderms have an endoskeleton made of calcareous ossicles or plates. In sea urchins these plates form a rigid test. This MCQ belongs to the Echinodermata topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Echinoderms have an endoskeleton made of calcareous ossicles or plates. In sea urchins these plates form a rigid test. This MCQ belongs to the Echinodermata topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
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