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An anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by:

  1. A
    Absence of secondary phloem
  2. B
    Presence of cortex
  3. C
    Position of protoxylem
  4. D
    Absence of secondary xylem

Solution & Step-by-step Explanation

Roots and stems are primarily distinguished by their xylem arrangement.Roots: Have exarch xylem (protoxylem is towards the periphery).Stems: Have endarch xylem (protoxylem is towards the center/pith).

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An anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by:
A
Absence of secondary phloem
B
Presence of cortex
C
Position of protoxylem
D
Absence of secondary xylem

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Plant AnatomyDicot RootDicot Stem

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