[Campbell Biology P.678] Which of the following statements accurately describes the characte... | Practice Question

Which of the following statements accurately describes the characteristics and functions of xylem and phloem in vascular plants?

  • A: Xylem transports water and minerals using dead cells called tracheids, while phloem transports sugars using cells alive at functional maturity.
  • B: Both xylem and phloem primarily conduct water and minerals from roots to leaves.
  • C: Lignin strengthens the cell walls of phloem, allowing it to withstand water pressure.
  • D: Xylem cells are alive at functional maturity, while phloem cells are dead at functional maturity.

Explanation

The text states that xylem conducts water and minerals and includes tracheids, which are dead at functional maturity and lignified. Phloem distributes sugars, amino acids, and other organic products, and its cells are alive at functional maturity. Option A correctly summarizes these distinct characteristics.