16317.The seed which possess the ability to germinate in suitable favourable condition is called
Quiescent
Viable
Dry
Darmant
16318.The condition of viable seed when seeds do not germinate even in presence of favourable environmental condition is called
Dormancy
Secondary Dormancy
Dead seed
None of these
16319.Softening or rupturing of hard seed coat for breaking dormancy is called
Villing
Vernalization
Stratification
Scarification
16320.The chemical substances like phenolics, caumarins, ferulic acid are
Growth harmones
Growth inhibitors
Germination inhibitors
Germination promoters
16321.Importance of day length in flowering of plants was first shown in:
Petunia
Letting
Tobacco
Cotton
16322.The seeds which can not germinate in absence of light is called
Positively photoblastic seed
Negatively photpblastic seed
Photoblastic seed
Photpperiodic seeds
16323.The seeds which can not germinate in absence of light is called
Positively photoblastic seed
Negatively photpblastic seed
Photoblastic seed
Photpperiodic seeds
16324.Germination inhibitors leached out by one plant may inhibit germination of seeds of other plants is called as
Allopathy
Allelopathy
Competitive absorption
Aromapathy
16326.Which one of the following acids is a derivative of carotenoids?
Abscisic acid
Indole butyric acid
Indole-3-acetic acid
Gibberellic acid
16327.Which of the following growth regulator is not used to break dormancy?
Ethylene
Gibberellins
Cytokinins
Abscisic acid
16328.Keeping seeds in well aerated, moist condition at 1-100°C temperature for weeks or months is called
Pre-ripening
Stratification
Scarification
Impaction
16329.By which method tasta is made permeable to water?
Vernalization
Scarification
Stratification
Impaction
16330.Which of the following substance acts as natural germination inhibitor?
Cytokinin
Gibberellin
Ethylene
Caumarin
16331.Threshing, chopping, rupturing seeds by hands or machines is called
Scarification
Chemical scarification
Mechanical scarification
Strafication
16333.Scarification is a method of overcoming dormancy in seeds which
contain immature embryo.
Hard seed coat.
possess germination inhibiting substance.
contain fully formed but physiologically unripe embryo.
16335.The lateral meristem in plant is reponsible for
Primary growth
Secondary growth
Exponential growth
Growht in elongation
16336.The rate of growth is called as
Growing index
Increasing index
Effective index
Efficiency index