Permanent Tissue · Botany

The complex permanent tissue phloem differs from xylem primarily because:

  1. Phloem conducts water, xylem conducts food
  2. Phloem is mostly dead, xylem is mostly living
  3. Phloem conducts in two directions, xylem mostly in one
  4. Phloem has lignified walls, xylem has cellulosic walls
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Correct answer: Phloem conducts in two directions, xylem mostly in one

Phloem facilitates the bidirectional movement of photosynthates from sources to sinks. Xylem, conversely, conducts water and minerals unidirectionally from roots to leaves.

Difficulty: Medium Question 12 of 20

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