CAIE A-Level Biology AS 7.1.2 Xylem and Phloem Distribution Questions
Explain xylem and phloem distribution in plant organs using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain the distribution of xylem and phloem in roots, stems and leaves.
CAIE A-Level Biology AS 7.1.2 Xylem and Phloem Distribution Questions question 1
The plan diagram of a transverse section through a dicotyledonous plant stem was drawn by a student. They had stained the section with a chemical that stains lignin.
Which row is correct for tissues W and Z ?
W
Z
stained
tissue
phloem
xylem
W
phloem
xylem
Z
xylem
phloem
W
xylem
phloem
Z
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