Xylem · Botany

Metaxylem elements differ from protoxylem elements in that metaxylem elements:

  1. Are formed earlier
  2. Are wider and pitted
  3. Are lacking in lignin
  4. Are living at maturity
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Correct answer: Are wider and pitted

Metaxylem matures after the protoxylem, once plant elongation has slowed or stopped. Consequently, metaxylem cells are larger in diameter and usually feature more extensive lignification, such as pitted or reticulate patterns.

Difficulty: Medium Question 12 of 20

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