In a longitudinal section of root, starting from the tip upward, the four zones occur in the 3 following order
root cap, cell division, cell enlargement, cell maturation
root cap, cell division, cell maturation, cell enlargement
cell division, cell enlargement, cell maturation, root cap
cell division, cell maturation, cell enlargement, root cap
Vascular tissue in flowering plants develop from
phellogen
plerome
eriblem
dermatogen
Passage cells are thin walled cells found in
endodermis of roots facilitating rapid transport of water from cortex to pericycle
phloem elements that serve as entry points for substances for transport to other plant parts
testa of seeds to enable emergence of growing embryonic axis during seed germination
central region of style through which the pollen tube grows towards the ovary
Monocot leaves possess
intercalary meristem
lateral meristem
apical meristem
mass meristem
Sieve tubes are suited for translocation of food because they possess
bordered pits
no end walls
broader lumen and perforated cross walls
no protoplasm
Cork is formed from
cork cambium (phellogen)
vascular cambium
phloem
xylem
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
Vascular cambium produces
primary xylem and primary phloem
secondary xylem and secondary phloem
primary xylem and secondary phloem
secondary xylem and primary phloem
Bordered pits are found in
sieve cells
vessel wall
companion cells
sieve tube wall
The apical meristem of the root is present
in all the roots
only in radicals
only in tap roots
only in adventitious roots
