Waec Biology Past Questions and Answers

Question 261:

• WAEC 1993

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

Question 262:

• WAEC 1993

The respiratory organ found in the cockroach is the

A. Air sac
B. Trachea
C. Lung book
D. Lung
E. Gill

Question 263:

• WAEC 1993

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

Question 264:

• WAEC 1993

Which of the following organs is associated with deamination of proteins?

A. Lung
B. Stomach
C. Kidney
D. Liver
E. Heart

Question 265:

• WAEC 1993

Ultrafiltration in the kidney takes place in the

A. Loop of Henle
B. Renal vein
C. Bowman’s capsule
D. Pelvis
E. Pyramid