Waec Biology Past Questions and Answers

Question 1751:

• 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 1752:

• WAEC 2018

Ultrafiltration in the kidney takes place in the

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

Question 1753:

• WAEC 2018

The thyroid gland is found at the base of the

A. Midbrain
B. Kidney
C. Neck
D. Liver

Question 1754:

• WAEC 2018

Which of the following statements about the response of neurones to stimulus is correct?

A. Neurons respond to stimulus of any strength
B. Neurons respond to all stimuli applied in rapid succession
C. Neurons respond more rapidly during the absolute refraction period
D. Intensity of stimulus must reach a threshold value before the neurons can be excited

Question 1755:

• WAEC 2018

Which of the following practices may lead to infection of the eye? Use of

A. Contact lenses
B. Convex lenses
C. Biconcave lenses
D. Concave lenses