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Which of the following characters is shared by arthropods and molluscs?

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Chitinous exoskeleton

Metameric segmentation

Open circulatory system

Water vascular system

answer is C.

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Detailed Solution

Both arthropods and molluscs have open circulatory system. Chitinous exoskeleton and metameric segmentation are present in arthropods but absent in molluscs. Water vascular system is found in echinoderms.

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