Leaves of many grasses are capable of folding and unfolding because they
are very thin
are isobilateral
have specialized bulliform cells
have parellel vascular bundles
The length of a plant can be increased by
periblem
dermatogen
apical meristem
lateral meristem
The Crescograph was invented by
Darwin
J.C.Bose
F.W.Went
C.V.Raman
The growth in plants can be measured by
direct method
arc auxanometer
Pfeffer's auxanometer
all of these
Curling of tendrils is due to
nyctinastic
phototropism
heliotropism
thigmotropism
The growth of plant is
limited
unlimited
unlocalised
none of these
Movement in leaves on Mimosa pudica is
epinastic
photonastic
seismonastic
Which combination of gases is suitable for fruit ripening?
80% CO2 and 20% CH2
80% CH4 and 20% CO2
80% CO2 and 20% O2
80% C2H4 and 20% CO2
The hormone responsible for apical dominance is
IAA
GA
ABA
florigen
Dwarfness can be controlled by treating the plant with
cytokinin
gibberellic acid
auxin
antigibberellin
