There is no distinction between tunica and corpus layers in the stem apices of

  • A
    Some pteridophytes
  • B
    Some gymnosperms
  • C
    All pteridophytes
  • D
    All angiosperms

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The $Tunica-Corpus$ theory was proposed by:

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The meristematic tissue present between the primary phloem and primary xylem is known as:

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Which of the following cell wall layers is absent in a meristematic cell?

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