Stem Anatomy · Botany

In stem xylem development, protoxylem is usually located toward the inside and metaxylem toward the outside. This condition is called:

  1. exarch
  2. endarch
  3. radial
  4. amphivasal
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Correct answer: endarch

Stem xylem is usually endarch, meaning protoxylem lies toward the center and metaxylem toward the outer side. Roots usually show the opposite condition, called exarch.

Difficulty: Medium Question 18 of 19

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