Vascular bundle, in which two patches of phloem are present on both sides of xylem is
Collateral
Bicollateral
Concentric
Radial
The undifferentiated cells are present in
Which of the following is the function of heartwood?
Cystoliths sometimes deposited in plant cells are crystals of (aggregation of)
Derivatives of the secondary meristem in the steler region are
Vessels are absent in