CBSE
Induction of cell division and delay in senescence is done by
cytokinins
auxins
GA
Co-A
The hormone, which prevents abscission is
IBA
ABA
NAA
Cytokinin
Ethylene is
gaseous hormone
largest hormone
liquid hormone
solid hormone
GA usually promotes
sterility in flowers
maleness in flowers
femaleness in flowers
Both (b) and (c)
The pH of protolasm is
6.0
6.8
7.8
8.2
Phototropic curvature in Avena coleoptile is the result of uneven distribution of
auxin
starch
gibberellins
phytochrome
Study of bakanae disease of rice led to discovery of
auxins
bakery rice
Both (a) and (b)
gibberellins
Which of the following induces and promotes cell division?
ABA
Auxin
Cytokinin
Gibberellin
Equipment used for the measurement of growth in plants is known as
respirometer
auxanometer
atmometer
potometer
When an ovary develops into a fruit without fertilization it is called
porogamy
apospory
apogamy
parthenocarpy