Waec Biology 2018 Past Questions and Answers

Question 16:

• WAEC 2018

The thyroid gland is found at the base of the

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

Question 17:

• 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 18:

• 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

Question 19:

• WAEC 2018

The structures for gaseous exchange in breathing roots are

A. Stomata
B. Lenticels
C. Cuticle
D. Mitochondria

Question 20:

• WAEC 2018

The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called

A. Housefly
B. Butterfly
C. Cockroach
D. Mosquito