Heartwood or duramen is:

  • A
    Outer region of secondary xylem
  • B
    Inner region of secondary xylem
  • C
    Outer region of secondary phloem
  • D
    Inner region of secondary phloem

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The position of xylem in secondary xylem is:

Which of the following is true for the dicot roots?

When secondary growth in thickness is initiated in a dicot root,which of the following happens first?

The function of the $phellogen$ (cork cambium) is to produce $........$.

From the plants given below,select the monocots having secondary growth in their stem.

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