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WAEC Biology 2026 Question 18

Question 18

Evolution

Use the following organisms: Cycad, Spirogyra, Fern, Tridax. The correct order of complexity of the organisms in the evolutionary trend would be

  1. A.cycad → Spirogyra → fern → Tridax
  2. B.Spirogyra → fern → cycad → Tridax
  3. C.fern → cycad → Tridax → Spirogyra
  4. D.Tridax → cycad → Spirogyra → fern
Show the answer and explanation

Answer: B (Spirogyra → fern → cycad → Tridax)

Explanation

Plants become more complex from algae (Spirogyra) to ferns (pteridophytes) to gymnosperms (cycad) to flowering plants (Tridax).