Abscisic acid treatment results in
leaf expansion
stem elongation
stomatal closure
root elongation
Which of the following hormone is responsible for senescence?
GA
ABA
auxin
cytokinin
Seed dormancy is due to
IAA
starch
ethylene
abscisic acid
Which of the following hormone is involved in phototropism?
2,4-D
kinetin
What will be the effect on phytochrome in a plant subjected to a continuous red light?
Increase in phytochrome
decrease in phytochrome
Change in the level of phytochrome
Change into other phytochrome type
Leaf fall starts when the amount of
auxin increases
auxin decreases
abscisic acid decreases
gibberellic acid decreases
The hormone, which controls cell division and cell differentiation is
gibberellin
Sleep movements of leaves in some plants, are due to
excess of respiration
excess of transpiration
leaves stop photosynthesis
osmotic changes at the base of leaves.
Low temperature treatment of seed is called as
scarification
pasturization
vernalization
fermentation
The length of a plant can be increased by
periblem
dermatogen
apical meristem
lateral meristem
