Which is correct about transport or conduction of substances ?
Organic food moves up through phloem
Organic food moves up through xylem
Inorganic food moves upwardly and downwardly through xylem
Organic food moves upwardly and downwardly through phloem
Organization of stem apex into corpus and tunica is determined mainly by
planes of cell division
regions of meristematic activity
rate of cell growth
rate of shoot tip growth
Pith and cortex do not differentiate in
monocot stem
dicot stem
monocot root
dicot root
Monocot leaves possess
intercalary meristem
lateral meristem
apical meristem
mass meristem
Out of diffuse porous and ring porous woods, which is correct ?
Ring porous wood, carries move water for short period
Diffuse porous wood carries more water
Ring porous wood carries more water when need is higher
Diffuse porous wood is less specialized but conducts water rapidly through out
Loading of phloem is related to
increases of sugar in phloem
elongation of phloem cell
separation of phloem parenchyma
strengthening of phloem fibre
A narrow layer of thin walled cells found between phloem/bark and wood of a dicot is
cork cambium
vascular cambium
endodermis
pericycle
The cells of the quiescent centre are characterised by
dividing regularly to add to tunica
having dense cytoplasm and prominent nuclei
having light cytoplasm and small nuclei
dividing regularly to add to the corpus
A leaf primordium grows into the adult leaf lamina by means of
marginal meristem
at first by apical meristem and later largely by marginal meristem
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
