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 emerrgence of growing axis during seed germination
central region of style through which the pollen tube grows towards the ovary.
Which of the following statements is true?
lateral meristem
intercalary meristem
apical meristem
parenchyma
Radial conduction of water takes place by ____________
X-vessels
Tracheids
Sclereids
Ray Parenchyma
A bicollateral vascular bundle is characterised by _______________.
phloem being sandwitched between xylem
transcerse splitting of vascular bundles
longitudinal splitting of vascular bundles
xylem being standwitched between phloem
The meristem that occur in nature regions of shots and roots are called ________
Secondary meristem
Primary meristem
Lateral meristem
All above
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is _____________.
maturing
elongating
widening
differentaiating
Phloem in Angiosperms is composed of
Siene tubes
Companion cells
Phloem parenchyma
All correct
Commercial cork is obtained from ___________.
Berberis / Barberry
Salix / willow
Quercus / oak
Betula / Brich
Sieve tubes are suited for translocation of food because they possess ____________.
bordered pits
no ends walls
broader lumen and perforated cross walls
no protoplasm
Which one yields fibre?
planes of cell division
regions of meristematic activity
rate of cell growth
rate od shoot tip growth
