Waec Biology 2018 Past Questions and Answers

Question 36:

• WAEC 2018

When large numbers of organisms share limited space and resources, the immediate result is

A. Extinction
B. Emigration
C. Competition
D. Immigration

Question 37:

• WAEC 2018

Which of the following disease ic caused by a bacterium?

A. Ringworm
B. Poliomyelitus
C. Syphilis
D. Malaria

Question 38:

• WAEC 2018

Conservation of wildlife is necessary mainly because

A. Wild species cannot resist disease better than their domesticated species
B. Many predator wild animals help in the control of pests
C. It prevents extinction of species
D. Many people derive pleasure from observing wild animals

Question 39:

• WAEC 2018

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.


Patients X and Y were likely transferred with blood of genotype

A. OO
B. AO
C. BO
D. AA

Question 40:

• WAEC 2018

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.


What should the hospital have done to prevent X from showing the symptom described above? Patient X should have

A. Undergone an agglutination test
B. Been asked for the blood group
C. Been screened for HIV
D. Undergone malaria test