The development of a true coelom derived from the mesoderm is first seen in:

Practice MCQ for SSC, UPSC, RRB Exams

A. Platyhelminthes A.
B. Aschelminthes B.
C. Annelida C.
D. Arthropoda D.

Correct Answer: C সঠিক উত্তর: C

Explanation ব্যাখ্যা

The Annelida are the first animal phylum to possess a true coelom (eucoelom), which is a body cavity completely lined by mesoderm.

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