Vascular bundles of roots are
Conjoint
Concentric
Bicollateral
Radial
Which of the following is absent in the primary and secondary structure of stem of Pinus
A hundred year old tree which shows well marked annual rings in its trunk will have
Members of Winteraceae, Tetracentraceae and Trochodendraceae
Palm is a monocotyledonous plant, yet it increases in girth. Why and how ?
Continuous ring of cambium is formed by