338223
Which of the following is/are factor causing seed dormancy?
1 Impermeable and hard seed coat
2 Chemical inhibitors like abscisic acids, phenolic acids and para-ascorbic acids
3 Immature embryos
4 All of them
Explanation:
Impermeable and hard seed coat; presence of chemical inhibitors such as abscissic acids, phenolic acids, para-ascorbic acid; and immature embryos are some of the reasons which causes seed dormancy.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
338224
Certain seeds which fail to germinate even when external conditions are favourable is due to
1 Photoperiodism
2 Seed dormancy
3 Vernalisation
4 Plasticity
Explanation:
Certain seeds which fail to germinate even when external conditions are favourable is due to seed dormancy.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
338225
Which of the following method would help in breaking seed dormancy?
1 Mechanical abrasions using knives, sandpaper, etc
2 Microbial action
3 Changing the environmental conditions like light and temperature
4 All of them
Explanation:
Seed dormancy can be overcome through natural means and various other man-made measures. For example, the seed coat barrier in some seeds can be broken by mechanical abrasions using knives, sandpaper, etc. or vigorous shaking. In nature, these abrasions are caused by microbial action, and passage through digestive tract of animals. Effect of inhibitory substances can be removed by subjecting the seeds to chilling conditions or by application of certain chemicals like gibberellic acid and nitrates. Changing the environmental conditions, such as light and temperature are other methods to overcome seed dormancy.
338223
Which of the following is/are factor causing seed dormancy?
1 Impermeable and hard seed coat
2 Chemical inhibitors like abscisic acids, phenolic acids and para-ascorbic acids
3 Immature embryos
4 All of them
Explanation:
Impermeable and hard seed coat; presence of chemical inhibitors such as abscissic acids, phenolic acids, para-ascorbic acid; and immature embryos are some of the reasons which causes seed dormancy.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
338224
Certain seeds which fail to germinate even when external conditions are favourable is due to
1 Photoperiodism
2 Seed dormancy
3 Vernalisation
4 Plasticity
Explanation:
Certain seeds which fail to germinate even when external conditions are favourable is due to seed dormancy.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
338225
Which of the following method would help in breaking seed dormancy?
1 Mechanical abrasions using knives, sandpaper, etc
2 Microbial action
3 Changing the environmental conditions like light and temperature
4 All of them
Explanation:
Seed dormancy can be overcome through natural means and various other man-made measures. For example, the seed coat barrier in some seeds can be broken by mechanical abrasions using knives, sandpaper, etc. or vigorous shaking. In nature, these abrasions are caused by microbial action, and passage through digestive tract of animals. Effect of inhibitory substances can be removed by subjecting the seeds to chilling conditions or by application of certain chemicals like gibberellic acid and nitrates. Changing the environmental conditions, such as light and temperature are other methods to overcome seed dormancy.
338223
Which of the following is/are factor causing seed dormancy?
1 Impermeable and hard seed coat
2 Chemical inhibitors like abscisic acids, phenolic acids and para-ascorbic acids
3 Immature embryos
4 All of them
Explanation:
Impermeable and hard seed coat; presence of chemical inhibitors such as abscissic acids, phenolic acids, para-ascorbic acid; and immature embryos are some of the reasons which causes seed dormancy.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
338224
Certain seeds which fail to germinate even when external conditions are favourable is due to
1 Photoperiodism
2 Seed dormancy
3 Vernalisation
4 Plasticity
Explanation:
Certain seeds which fail to germinate even when external conditions are favourable is due to seed dormancy.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
338225
Which of the following method would help in breaking seed dormancy?
1 Mechanical abrasions using knives, sandpaper, etc
2 Microbial action
3 Changing the environmental conditions like light and temperature
4 All of them
Explanation:
Seed dormancy can be overcome through natural means and various other man-made measures. For example, the seed coat barrier in some seeds can be broken by mechanical abrasions using knives, sandpaper, etc. or vigorous shaking. In nature, these abrasions are caused by microbial action, and passage through digestive tract of animals. Effect of inhibitory substances can be removed by subjecting the seeds to chilling conditions or by application of certain chemicals like gibberellic acid and nitrates. Changing the environmental conditions, such as light and temperature are other methods to overcome seed dormancy.