Which of the following plant hormones reduce the transpiration rate by inducing stomatal closure?
ABA
ethylene
cytokinin
gibberellin
Which of the following is the stress hormone?
IAA
IBA
2, 4-D
Phytochrome becomes active in
darkness
red light
blue light
green light
The hormone present in the liquid endosperm of coconut is
auxin
The hormone, which causes stunted growth in pea, is
abscisic acid
The growth in plants can be measured by
direct method
arc auxanometer
Pfeffer's auxanometer
all of these
Which among the following is a synthetic plant hormone?
GA
2,4-D
The most common auxin is
kinetin
indole acetic acid
Auxanometer is used to measure
growth
transpiration
respiration
ascent of sap
Which of the following is correct for auxin?
ripening of fruits
breaking of dormancy
inhibition of flowering
stimulation of root growth
