First slide

Classification of Animals

Question

What is common to earthworm and silkworm?

Moderate

A

Chitinous exoskeleton and true coelom
B

Metamerism and jointed legs
C

True coelom and metamerism
D

Complete digestive system and open circulatory system

Solution

Both annelids (e.g., earthworm) and arthropods (e.g., silkworm) are coelomates and exhibit metamerism. Chitinous exoskeleton and jointed legs are absent in annelids. Circulatory system of annelids is closed type while that of arthropods is open type.

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