Secondary phloem is part of the inner bark, which is the outermost layer of the bark of a tree. It is responsible for transporting carbohydrates from the leaves to the rest of the plant. It includes live companion cells and dead sieve cells, but does not encompass more stem volume than secondary xylem. It is produced by the vascular cambium, not the cork cambium.

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Secondary Phloem

Question 49

Multiple Choice

Secondary phloem

A) includes live companion cells and dead sieve cells.
B) encompasses more stem volume than secondary xylem.
C) primarily stores carbohydrates.
D) is part of the inner bark.
E) is produced by the cork cambium.

Correct Answer: