Abscisic acid controls
cell division
leaf fall dormancy
shoot elongation
cell elongation and wall formation
Which one of the following acids is a derivative of carotenoids?
Indole-butyric acid
Indole-3-acetic acid
Gibberellic acid
Abscisic acid
Highest auxin concentraton occurs
in growing tips
in leaves
at base of plant organs
in xylem and phloem
If a tree, flowers thrice in a year(Oct., Jan. and July) in Northern India , it is said to be
photosensitive but thermoinsensitive
thermosensitive but photosensitive
photo and thermosensitive
photo and thermoinsensitive
Cell elongation in internodal regions of the green plants takes place due to
indole acetic acid
cytokinins
gibberellins
ethylene
Ethylene gas is used for
growth of plants
delaying fruit's abscission
ripening of fruits
stopping the leaf abscission
The Crescograph was invented by
Darwin
J.C.Bose
F.W.Went
C.V.Raman
Phytohormones are
chemicals regulating flowering
chemicals regulating secondary growth
hormones regulating growth from seed to adulthood
regulators synthesized by plants and influencing physiological processes
Growth of pollen tube towards embryo sac is
geotropism
thigmotaxis
chemotaxis
all of these
Auxanometer is used to measure
growth
transpiration
respiration
ascent of sap