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WAEC Past Questions and Answers - Page 3897

19,481.

Which of the following infections would not respond to antibiotic treatment?

A.

Gonorrhoea

B.

Measles

C.

Diarrhoea

D.

Tuberculosis

Correct answer is B

Measles is an infectious illness caused by the rubeola virus. It spreads either through direct contact with a person who has the virus or through droplets in the air. Measles is a highly contagious disease that can lead to life-threatening complications.

The others are caused by Bacteria which can be treated with antibiotics.

19,482.

A population which exceeds its carrying capacity and then collapses is represented graphically as a?

A.

bell shaped curve

B.

skewed curve

C.

s-shaped curve

D.

linear curve

Correct answer is C

S-shaped growth curve(sigmoid growth curve): A pattern of growth in which, in a new environment, the population density of an organism increases slowly initially, in a positive acceleration phase, then increases rapidly, approaching an exponential growth rate but then declines in a negative acceleration phase until at zero growth rate the population stabilizes.

19,483.

The order of primary succession by plants in a very dry habitat is?

A.

xerophytes → mesophytes → shrub

B.

mesophytes → xerophytes → shrub

C.

mesophytes → shrub -> xerophytes

D.

 xerophytes → shrub → mesophytes

Correct answer is C

No explanation has been provided for this answer.

19,484.

Find the value of x in the diagram

A.

31o

B.

35o

C.

37o

D.

41o

Correct answer is B

Sum of exterior angle of any polygon is 360o
(2x+5)o + 2xo + (x-20)o + xo + (3x+10)o + (x + 15)o = 360o; 10x = 350
x = 35

19,485.

Find the value of x in 0.5x + 2.6 = 5x + 0.35

A.

0.5

B.

2

C.

2.6

D.

5

Correct answer is A

0.5x+2.6=5x+0.350.5x5x=0.352.64.5x=2.25x=2.254.50.5