Root development is promoted by
abscisic acid
auxin
gibberellin
gibberellin
B.
auxin
The higher concentration of auxin causes inhibition of root elongation, but the number of lateral branches in the root is considerably increased. In plant tissue cultures, relatively amounts of auxin and cytokinin induce the development of root, shoot or undifferentiated mass of tissues. High auxin to cytokinin ratio favours the root development high cytokinin to auxin ratio favours shoot development, while intermediate concentration results in the formation of undifferentiated cell mass.
One of the commonly used plant growth hormone in tea plantations is
ethylene
abscisic acid
Zeatin
Zeatin
Phototropic curvature is the result of uneven distribution of
gibberellin
phytochrome
cytokinins
cytokinins
The technical term used for the androecium in a flower of China rose (Hibiscus rosa siensis( is
monadelphous
diadelphous
polyandrous
polyandrous
In which one of the following, the male and female gametophytes don't have free -living independent existence ?
Pteris
Funaria
Polytrichum
Polytrichum
Stroma in the chloroplasts of higher plants contains
light -independent reaction enzymes
Light -dependent reaction enzymes
ribosomes
ribosomes
