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Question
Absence of head, unsegmented body and endoskeleton of the calcareous plate are characteristics exhibited by members of which phylum?
Absence of head, unsegmented body and endoskeleton of the calcareous plate are characteristics exhibited by members of which phylum?
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Solution
The correct option is C Echinodermata
Echinoderms do not have a distinct head. They have an unsegmented body. Their endoskeleton consist of calcareous plate (dermal ossicle).
Molluscans body is divided into head, a dorsal visceral mass and muscular foot. Their body is unsegmented. The mantle usually secretes an external calcareous shell. Shell is made up of calcium carbonate.
Arthropoda have metamerically segmented bodies. Their body is divided into three regions - head, thorax and abdomen. A chitinous exoskeleton covers their body.
Echinoderms do not have a distinct head. They have an unsegmented body. Their endoskeleton consist of calcareous plate (dermal ossicle).
Molluscans body is divided into head, a dorsal visceral mass and muscular foot. Their body is unsegmented. The mantle usually secretes an external calcareous shell. Shell is made up of calcium carbonate.
Arthropoda have metamerically segmented bodies. Their body is divided into three regions - head, thorax and abdomen. A chitinous exoskeleton covers their body.
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