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Q.
Which one of the following features is common to cockroach, earthworm and mosquito?
NTA AbhyasNTA Abhyas 2022
Solution:
Presence or absence of a cavity between the body wall and the gut wall is very important in classification. The body cavity, which is lined by the mesoderm is termed as coelom. Animals possessing coelom are called coelomates, e.g., annelids, molluscs, arthropods, echinoderms, hemichordates and chordates