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Xylem and phloem
Higher
2 marks
Describe two structural differences between xylem and phloem cells.
A
Xylem: dead, hollow, lignified walls; Phloem: living cells with sieve plates and companion cells
B
Xylem: living cells with mitochondria; Phloem: dead hollow tubes
C
Both are dead cells; both have lignified walls
D
Xylem: transports in both directions; Phloem: only upward
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