Question
A lab observation notes that a round spiny echinoderm lacks arms and has a compact test. The observation points to:
Correct Answer: D
sea urchins and sand dollars
Sea urchins and sand dollars belong to Echinoidea. They typically lack arms and have a compact body enclosed by a test. This MCQ belongs to the Echinoidea topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
Sea urchins and sand dollars belong to Echinoidea. They typically lack arms and have a compact body enclosed by a test. This MCQ belongs to the Echinoidea topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.
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