Death of protoplasm is a pre-quisite for a vital function like
transport of sap
transport of food
absorption of water
gaseous exchange
Which exposed wood will decay faster?
Sapwood
Softwood
Wood with lot of fibres
Heartwood
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
Periderm is produced by
vascular cambium
fascicular cambium
phellogen
intrafascicular cambium
The length of different internodes in a culm of sugarcane is variable because of
shoot apical meristem
position of axillary buds
size of leaf lamina at the node below each internode
intercalary 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
Vascular cambium produces
primary xylem and primary phloem
secondary xylem and secondary phloem
primary xylem and secondary phloem
secondary xylem and primary phloem
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 narrow layer of thin walled cells found between phloem/bark and wood of a dicot is
cork cambium
endodermis
pericycle
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
