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In snails, the hard calcareous shells are secreted by the

In snails, the hard calcareous shells are secreted by the
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Radula
  • B Ctenidium
  • C Pneumostome
  • D Mantle
Correct Answer: Option D
Explanation:

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