First slide

Classification of Animals

Question

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

Moderate

A

Chitinous exoskeleton
B

Metameric segmentation
C

Open circulatory system
D

Water vascular system

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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