Angular collenchyma occurs in
Cucurbita
Tagetes
Althaea
Salvia
In barley stem, vascular bundles are
open and scattered
closed and scattered
open and in a ring
closed and radial
Periderm is produced by
vascular cambium
fascicular cambium
phellogen
intrafascicular cambium
For union between stock and scion in grafting which one is the first to occur ?
Formation of callus
Production of plasmodesmata
Differentiation of new vascular tissues
Regeneration of cortex and epidermis
A common structural feature of vessel elements and sieve tube elements are
pores on lateral walls
presence of p-protein
enucleate condition
thick secondary walls
Cork is formed from
cork cambium (phellogen)
phloem
xylem
Commercial cork is obtained from
Berberis/Barberry
Salix/Willow
Quercus/Oak
Betula/Birch
At maturity which of the following is enucleate ?
Sieve cell
Companion cell
Palisade cell
Cortical cell
Bananas can be prevented from over ripening by
maintaining them at room temperature
refrigeration
dipping in ascorbic acid solution
storing in a freezer
Tunica corpus theory is connected with
root apex
root cap
shoot apex
secondary growth
