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level: Plant Hormones (HARD)

Questions and Answers List

level questions: Plant Hormones (HARD)

QuestionAnswer
Plant hormones that control and coordinate plant growth.Auxins
What are auxins, and what is their role in plant growth?Auxins are plant hormones that control and coordinate plant growth.
The location where auxins are produced in plants, specifically in the tips of roots and shoots.Auxin Production
Where are auxins produced in plants?Auxins are produced in the tips of plant roots and shoots.
The ability of auxins to both increase and decrease the growth rates of roots and shoots.Dual Effect of Auxins
What is the dual effect of auxins on the growth rates of roots and shoots?Auxins can both increase and decrease the growth rates of roots and shoots.
Two types of plant growth influenced by auxins: phototropism and gravitropism.Types of Plant Growth Affected by Auxins
What are the two types of plant growth affected by auxins?Auxins influence phototropism and gravitropism.
Plant growth in response to light.Phototropism
What is phototropism, and how does auxin influence it?Phototropism is plant growth in response to light, and auxins play a role in regulating this growth.
Plant growth in response to gravity.Gravitropism
What is gravitropism, and how does auxin influence it?Gravitropism is plant growth in response to gravity, and auxins play a role in regulating this growth.
Plant growth in response to light, specifically shoots growing towards the light.Positive Phototropism
What is positive phototropism, and what is its specific effect on plant growth?Positive phototropism is plant growth in response to light, causing shoots to grow towards the light.
The process where auxin builds up on the shaded side of a growing shoot.Auxin Accumulation
What happens during auxin accumulation in a growing shoot?Auxin builds up on the shaded side of the shoot.
The effect of auxin on the growth rate of the shaded side of a shoot.Increased Growth Rate
How does auxin influence the growth rate of the shaded side of a shoot?Auxin increases the growth rate of the shaded side.
The result of the shaded side growing faster than the bright side in phototropism.Shoot Bending
What happens when the shaded side of a shoot grows faster than the bright side in phototropism?The shoot bends towards the light as a result of differential growth.
Plant growth in response to gravity, with roots growing downwards and shoots growing upwards.Gravitropism
What is gravitropism, and what is its specific effect on the growth of roots and shoots?Gravitropism is plant growth in response to gravity, causing roots to grow downwards and shoots to grow upwards.
The uneven distribution of auxin in roots, concentrating on the lower side.Auxin Distribution in Roots
How is auxin distributed in roots during gravitropism?Auxin builds up on the lower side of the root.
The effect of auxin on the growth rate of the lower side of a growing root.Decreased Growth Rate in Roots
What happens to the growth rate of the lower side of a root due to auxin during gravitropism?Auxin decreases the growth rate of the lower side, causing the root to grow downwards.
The uneven distribution of auxin in shoots, concentrating on the lower side.Auxin Distribution in Shoots
How is auxin distributed in shoots during gravitropism?Auxin concentrates on the lower side of the shoot.
The effect of auxin on the growth rate of the lower side of a growing shoot.Increased Growth Rate in Shoots
What happens to the growth rate of the lower side of a shoot due to auxin during gravitropism?Auxin increases the growth rate of the lower side, causing the shoot to grow upwards.
The practice of growing plants for food.Agriculture
What is agriculture, and what is its primary purpose?Agriculture is the practice of growing plants for food.
The practice of growing plants for decoration.Horticulture
What is horticulture, and what is its primary purpose?Horticulture is the practice of growing plants for decoration.
The application of auxin to control and improve plant growth in agriculture and horticulture.Commercial Use of Auxin
How is auxin commercially used in agriculture and horticulture?Auxin is applied to control and improve plant growth in agriculture and horticulture.
A weedkiller containing auxin that, when applied, makes weeds grow too quickly and die.Auxin-Based Weedkiller
How does an auxin-based weedkiller work, and what is its effect on weeds?Applying an auxin-based weedkiller makes weeds grow too quickly, leading to their death, while grass and crop plants are unaffected.
The reason grass and crop plants are not affected by auxin-based weedkillers.Broad Leaves Absorption
Why are grass and crop plants not affected by auxin-based weedkillers?Grass and crop plants are not affected because they don't have broad leaves to absorb the extra auxin.
The use of auxin as a rooting powder for cuttings to encourage root growth.Auxin as Rooting Powder
How is auxin used as a rooting powder, and what is its purpose?Dipping cuttings in an auxin-based rooting powder encourages them to grow roots, facilitating successful planting.
Plant hormones that naturally influence the growth of seeds, flowers, and fruit.Gibberellins
What are gibberellins, and what aspects of plant growth do they influence?Gibberellins are plant hormones that naturally affect the growth of seeds, flowers, and fruit.
The application of gibberellins to control plant growth in agriculture and horticulture.Commercial Use of Gibberellins
How are gibberellins commercially used in agriculture and horticulture?Gibberellins are applied to control plant growth in agriculture and horticulture.
A period when seeds cannot germinate (grow).Seed Dormancy
What is seed dormancy, and how can gibberellins be used to end it?Seed dormancy is a period when seeds cannot germinate, and applying gibberellins encourages seeds to germinate.
The effect of applying gibberellins to seeds, encouraging them to germinate.Germination Stimulation
How do gibberellins influence seed germination?Applying gibberellins to seeds stimulates germination.
The stimulation of flowering and the production of larger fruits by applying gibberellins to plants.Flowering and Fruit Growth
How do gibberellins influence flowering and fruit growth in plants?Applying gibberellins to plants encourages them to flower and produce bigger fruits.
The use of gibberellins to produce seedless fruit, such as seedless grapes.Production of Seedless Fruit
How can gibberellins be used to produce seedless fruit, and what is an example?Applying gibberellins to unpollinated flowers on grapevines results in the growth of seedless grapes, making them easier to eat.
A plant hormone that controls fruit ripening.Ethene
What is ethene, and what role does it play in plant physiology?Ethene is a plant hormone that controls fruit ripening.
The use of ethene gas in fruit storage and transport containers to control ripening.Ethene Gas in the Food Industry
How is ethene gas utilized in the food industry, specifically in fruit storage and transport?Ethene gas is added to fruit storage and transport containers to control ripening.
The effect of ethene gas on fruit ripening, making it occur more quickly.Accelerated Ripening
What happens to fruit ripening when ethene gas is added, and how is it advantageous?Ethene gas accelerates fruit ripening, allowing unripe fruits to be picked and transported, then ripened conveniently for sale.
An example of ethene gas effect, where adding ethene to green bananas causes them to turn yellow quickly.Example: Green Bananas to Yellow
Provide an example of the effect of ethene gas on banana colour.Adding ethene gas to a crate of green bananas causes them to quickly turn yellow.
The advantage of using ethene gas in fruit storage, allowing fruits to be ripened whenever convenient for sale.Convenient Ripening
How does the use of ethene gas make fruit ripening more convenient in the food industry?Ethene gas allows fruits to be picked and transported when unripe, then conveniently ripened for sale whenever needed.