Waec Biology 1999 Past Questions and Answers

Question 16:

• WAEC 1999

Which of the following is correct about the transverse section of a vein, when compared with that of an
artery?

A. The lumen of a vein is wider than that of an artery
B. The endothelium of the vein is thinner than that of an artery
C. There are more smooth muscles in a vein than in an artery
D. There are valves in veins but not in arteries.

Question 17:

• WAEC 1999

Terrestrial plants exchange gases through the following except

A. Chloroplast
B. Stomata
C. Lenticels
D. Root-cells

Question 18:

• WAEC 1999

Glomerular nitrate contains

A. No glucose
B. Amino acids
C. No proteins
D. Urea

Question 19:

• WAEC 1999

Which of the following is not a function of the liver in mammals?

A. Storage of some vitamins
B. Conversion of glycogen into glucose
C. Deamination of excess nitrogenous substances
D. Filtration of urea from the blood.

Question 20:

• WAEC 1999

Iodine is needed by a patient suffering from a malfunctioning of the

A. Salivary gland
B. Thyroid gland
C. Adrenal gland
D. Sebaceous gland