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JAMB Biology 1983 Question 2

Question 2

Structure of Flowering Plants

Use Fig. 1 to answer questions 2-4. Fig 1 represents a cross section of part of a dicot plant. Which of the following features can be used to identify Fig. 1?

Diagram for this question
  1. A.Position of 7
  2. B.Its circular nature
  3. C.Number of 5
  4. D.Presence of 3
  5. E.Width of 2
Show the answer and explanation

Answer: A (Position of 7)

Explanation

Fig. 1 is a young dicot root: the xylem (7) forms a star in the very centre with the phloem between its arms. This central, radial position of the xylem is what marks it out as a root.