Waec Biology 2018 Past Questions and Answers

Question 11:

• WAEC 2018

A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was

A. The importance of micro elements to plants
B. Ascent of water through the xylem
C. Diffusion of colored substances
D. Distribution of food in plants

Question 12:

• WAEC 2018

Which of the following structures would carry out cellular respiration? A

A. Germinating seed
B. Decolorised leaf
C. Dry leaf
D. Boiled cowpea

Question 13:

• WAEC 2018

Which of the following is NOT an excretory product of animals?

A. Carbondioxide
B. Urea
C. Sweat
D. Oxygen

Question 14:

• WAEC 2018

An example of homeostasis in living organisms is

A. Cooling effect resulting from evaporation of water from the body surface
B. Root hairs of a plant growing towards the source of light
C. Changing of the body colour of chameleon to match the colour of the foliage on which it is resting
D. The release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil

Question 15:

• WAEC 2018

Ultrafiltration in the kidney takes place in the

A. Renal vein
B. Medulla
C. Loop of Henle
D. Bowman's Capsule