The diagram shows transverse sections of two plant structures.
Which labels correctly identify structures 1, 2, 3 and 4?
1
|
2
|
3
|
4
|
|
A
|
phloem
|
xylem
|
xylem
|
phloem
|
B
|
xylem
|
phloem
|
xylem
|
phloem
|
C
|
phloem
|
xylem
|
phloem
|
xylem
|
D
|
xylem
|
phloem
|
phloem
|
xylem
|
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