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Biology 2016 WAEC Past Questions

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41
Use the diagram above that shows the effect of nitrates on water bodies Study it carefully and answer questions.

Another cause that could lead to the phenomenon in the diagram is
  • A. exhaust from cars
  • B. oil spillage
  • C. dumping of sewage
  • D. excess rainfall
View Answer & Discuss WAEC 2016
42
The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.

What is the genotype ratio of carrier females to normal males in the cross?
  • A. 1:1
  • B. 2:3
  • C. 3:4
  • D. 4:1
View Answer & Discuss WAEC 2016
43

The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.

Which of the genotypes are carriers of colour blindness?

  • A. 1 and 11 only
  • B. 1 and 111 only
  • C. 11 and 111 only
  • D. 1, 11 and 111 only
View Answer & Discuss (3) WAEC 2016
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44
The type of placentation illustrated in the diagram above is
  • A. marginal
  • B. perietal
  • C. axile
  • D. basal
View Answer & Discuss (1) WAEC 2016
45
Plant A was seen to appear as Plant B after seven hours
Study the above diagrams carefully and answer the questions.

The term that can be used to describe what happened to Plant A after seven hours is
  • A. wilting
  • B. competition
  • C. transpiration
  • D. Osmosis
View Answer & Discuss WAEC 2016
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