Secondary Growth · Botany

The phellogen, also known as cork cambium, usually originates from which layer in the dicot stem?

  1. Epidermis
  2. Cortex
  3. Phloem
  4. Xylem
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Correct answer: Cortex

In most dicot stems, the phellogen or cork cambium arises from the outer layers of the cortical parenchyma. It divides to produce phellem (cork) and phelloderm.

Difficulty: Medium Question 5 of 20

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