“Foolish seedling" disease of rice led to the discovery of:-
Which one of the following pairs, is not correctly matched?
(a) Abscisic acid - Stomatal closure
(b) Gibberellic acid - Leaf fall
(c) Cytokinin - Cell division
(d) IAA - Cell wall elongation
How does pruning help in making the hedge dense:-
(a) It induces the differentiation of new shoots from the rootstock
(b) It frees axillary buds from apical dominance
(c) The apical Shoot grows faster after pruning
(d) It releases wound hormones
Treatment of seed at low temperature under moist conditions to break its dormancy is called ?
An enzyme that can stimulate germination of barley seeds is:-
(a) α-amylase (b) lipase
(c) protease (d) invertase
The aquatic plant Limnophila has leaves of more than one shape. The condition is described as
Vernalization is the process of
(a) flower induction by high temperature treatment
(b) inhabitation of flowering by low temperature treatment
(c) flower induction by light treatment
(d) acceleration of the ability of a plant to produce flowers by chilling treatment
Parthenocarpy in grapes is induced by:-
Induction of flowering by low temperature in plants is
Which of the following statements is correct regarding short day plants (SDPs)?
(a) They can flower in complete darkness if supplied with exogenous nutrients.
(b) They are the same as long day plants.
(c) They do not have a critical photoperiod.
(d) All of these.