Wound healing is due to
Primary meristem
Secondary meristem
Ventral meristem
All of the above
$T.S.$ of stem of Cucurbita can be identified from the $T.S.$ of sunflower stem by the presence of
Vascular bundles in which phloem is found on both sides of xylem are called (In which of the following phloem occurs in two patches)
Continuous ring of cambium is formed by
A fibre which contains simple pits is