Question
Mention at least four important affinities between Hemichordates and annelids.
Answer :
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Hemichordates show several important affinities with annelids, indicating a degree of evolutionary relationship in terms of organization and physiology. Both groups possess a worm-like, elongated body adapted for burrowing or living in soft substrates, which reflects similarities in their mode of life. The body in both hemichordates and annelids is bilaterally symmetrical and triploblastic, with well-differentiated tissues and organ systems derived from ectoderm, mesoderm, and endoderm. Another significant affinity is the presence of a true coelom. In hemichordates, the coelom is well developed and enterocoelic in origin, while
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