WAEC Biology 2022 Objective — Question 31

Question 31 of 50 from the West African Examinations Council (WAEC) Biology 2022 Objective paper, with the correct answer and a full explanation.

The diagram below is an illustration of an experiment on sedimentation of soil. Use it to answer questions 31 and 32. The organic component of the soil is labelled

A. ICorrect
B. II
C. III
D. IV

Explanation

In a soil sedimentation experiment, the organic matter (humus) — being the lightest — settles as the topmost layer, corresponding to part I.

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