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Saturday, 13 June 2026
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Biology Past Questions and Answers

Waec Biology Questions

Question 261:
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
  • A Concentration gradient across the respiratory surface
  • B Concentration gradient across the respiratory surface B. presence of thin membrane as the respiratory surface
  • C Last transportation of absorbed gases
  • D Presence of large surface area of the respiratory organ
  • E Presence of small, dry surface area of the respiratory organ
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Question 262:
The respiratory organ found in the cockroach is the
  • A Air sac
  • B Trachea
  • C Lung book
  • D Lung
  • E Gill
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Question 263:
Which of the following structures functions as an excretory, system found in flatworm?
  • A Contractile vacuole
  • B Nephridium
  • C Flame cell
  • D Malplghlan tubule
  • E Kidney
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Question 264:
Which of the following organs is associated with deamination of proteins?
  • A Lung
  • B Stomach
  • C Kidney
  • D Liver
  • E Heart
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Question 265:
Ultrafiltration in the kidney takes place in the
  • A Loop of Henle
  • B Renal vein
  • C Bowman’s capsule
  • D Pelvis
  • E Pyramid
View Answer & Explanation