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Model Paper 9 — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETModel Paper 94 Marks
MCQ
Anatomically old dicotyledonous root is distinguished from the dicotyledonous stem by:
  • A
    Presence of cortex
  • B
    Absence of secondary phloem
  • C
    Absence of secondary xylem
  • D
    Position of protoxylem
✓

Answer

D.  Position of protoxylem
Explanation:
In dicot root the protoxylem is located near the periphery of the vascular cylinder, the metaxylem farther inward i.e., exarch or centripetal. In dicot stem the protoxylem is located near the centre of vascular bundle and metaxylem is located near the periphery i.e., endarch or centrifugal.

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