Identify the incorrect statement about ABA growth regulator.
(a) It increases the tolerance of plants against different stresses.
(b) It acts as general plant growth inhibitor and inhibitor of metabolism.
(c) It helps in seed maturation and dormancy.
(d) It promotes morphogenesis and differentiation of shoots.
Identfy the incorrect option for effects of the red and far red light.
Far Red Light
(a) stimulates germination
Which of the following plant growth hormone increase the yield of sugar by increasing the length of stem in sugarcane?
(c) Gibberellic acid
In the process of apical dominance, lateral buds are unable to grow in the presence of apical bud. This is due to:-
(a) less amount of cytokinins in lateral buds
(b) more amount of cytokinins in lateral buds
(c) less amount of auxin in lateral buds
(d) more amount of auxin in lateral buds
Refrigerated fruits maintain flavour and taste for longer period due to:-
(a) non-availability of O2
(b) the presence of excess of CO2
(c) the presence of excess humidity
(d) slower rate of respiration
The biological clock measures the length at each night by the?
(a) relative amount of red absorbing and far-red absorbing phytochrome present at dawn
(b) amount of far-red absorbing phytochrome at dusk
(c) relative amount of red absorbing and far-red absorbing phytochrome at mid day
(d) rate at which are kind of phytochrome is converted to the other
Which one of the following generally act as an antagonists to gibberellins?
(a) Zeatin (b) Ethylene
(c) ABA (d) IAA
A physiological response of plants to the duration of light and darkness is a:-
(a) daily phase cycle
(b) circadian rhythms
(c) biological clock
ABA is involved in?
(a) shoot elongation (b) increased cell division
(c) dormancy of seed (d) root elongation