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WAEC Biology 2023 Objective — Question 2

Question 2 of 50 from the West African Examinations Council (WAEC) Biology 2023 Objective paper, with the correct answer and a full explanation.

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The diagram below is an illustration of a mango leaf drawn by a student in a Biology test. The student failed the test. Study it and answer questions 2 and 3. The likely reason why the student failed the test was that the

Diagram for question 2
  • A. labels were wrong and the guidelines were not touching the structuresCorrect
  • B. net venation shown were few, rough, not properly drawn and wrongly placed
  • C. leaf was too tapered at the apex, the leaf stalk was too short and the shape of the leaf venation was wrong
  • D. leaf venation should have been parallel and the mid-rib should be thicker

Explanation

The guidelines were not touching the structures; the student labelled the vein as 'lamina' and the lamina as 'vein'; the student labelled the midrib as 'margin' — these labelling errors are why the student failed.

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