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Answer: 3. A only

Key idea: coelom type of each phylum.

  • A: Annelids are true coelomates (metameric segmentation) - correct.
  • B: Poriferans are acoelomate (no body cavity, cellular level) - wrong.
  • C: Aschelminthes are pseudocoelomates - wrong.
  • D: Platyhelminthes are acoelomates - wrong.

Only A is correct: option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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