CIE iGCSE Co-Ordinated Science B8.1 Xylem and phloem Exam Style Questions Paper 1
Question
The diagrams represent sections through a root, a stem and a leaf mid-rib, not drawn to the same scale.
In which row are the sections correctly identified?
▶️Answer/Explanation
Ans : C
Question
Which row names the substances carried by xylem vessels and the direction of travel?
▶️Answer/Explanation
Ans: D
Question
Which label shows the position of the xylem in the cross-section of the root of a dicotyledonous plant?
▶️Answer/Explanation
Ans : C
Question
The diagrams show sections through a stem and a root.
Which indicate the positions of the xylem?
A P and S
B P and T
C Q and S
D Q and T
▶️Answer/Explanation
Answer: B
Explanation: The xylem is typically located in the center of the root and towards the inner part of the stem, corresponding to positions P and T in the diagram.
Question
Which graph shows the concentration of sugar solution found in phloem and xylem?
▶️Answer/Explanation
Answer: B
Explanation: The phloem transports sugars from the leaves to other parts of the plant, so the concentration of sugar in the phloem is higher than in the xylem, which primarily transports water and minerals.
Question
The diagram shows a transverse section through a plant stem.
Which tissue is X?
A. mesophyll
B. phloem
C. epidermis
D. xylem
▶️Answer/Explanation
Answer: B. phloem
Explanation: The phloem is responsible for transporting sucrose and amino acids in plants. In a transverse section of a plant stem, the phloem is typically located near the outer part of the vascular bundle, which matches the description of tissue X in the diagram.