P-proteins belong to :
xylem parenchyma
trichomes
sieve tube elements
tracheids and vessels
C.
sieve tube elements
P-protein or phloem protein are proteinaceous substance. They are found in cells of flowering plant phloem, particularly in sieve tube members where it may block or hinder translocation through sieve pores.
Quiescent centre is found in root apex and acts as
permanent source of active initiates
reservoir of resistant cells
reservoir of passive cells to form new root apex if root apex is damaged/ killed
all of the above
Which type of meristems allow the fallen stems of cereals/ grasses to become erect?
Apical meristem
Lateral meristem
Intercalary meristem
Secondary meristem
An open collateral bundle is one in which :
xylem and phloem are seprated by cambium;
xylem and phloem lie side by side
cambium occurs on the out side of bundle
cambium does not occur in the bundle
Cook cambium and vascular cambium are :
parts of secondary xylem and phloem
parts of pericycle
lateral meristems
apical meristems
Phytotron is :
a controlled condition chamber for tissue
leaf culture process
special culture of plants
root culture process
Largest number of chloroplast is found in :
palisade tissue
spongy tissue
transfusion tissue
bundle sheath cells
Growth rings are formed due to activity of :
extrastelar cambium
intrastelar cambium
interstelar cambium
both 'b' and 'c'
