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The statements about plant growth hormones that are made below:
1. Ethylene regulates abscission.
2. Gibberellins do not play any role in flowering.
3. Auxin and cytokinin promote cell division.
4. Over expression of cytokinin oxidase would promote root growth.
5. ABA inhibits root growth and promotes shoot growth at low water potential.
6. ABA promotes leaf senescence independent of ethylene.
Which one of the following combination of above statements is correct?
- a)1, 3 and 6
- b)2, 3 and 4
- c)4, 5 and 6
- d)2, 4 and 5
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The statements about plant growth hormones that are made below: 1. Eth...
Concept:
- Despite the fact that they cannot move, plants still react to their surroundings.
- Plants are able to detect changes in gravity, light, touch, and season.
- Plants are able to detect light and move toward it as they grow
- According to scientists, plants can react to "stimuli," or things that normally occur in the environment and cause a reaction. like the plant moving toward the light is the "reaction," while light is the stimulus.
- Hormones are unique chemical messengers that assist organisms, including plants, in responding to environmental stimuli.
- Plants need to be able to interact with other cells in order for them to react to their surroundings.
- Hormones communicate between cells.
- Similar to humans, animals have hormones like testosterone or oestrogen that act as messengers between cells.
- Hormones go from cell to cell in plants and animals in reaction to a stimulus, and they also start a particular response.
Explanation:
- The primary responses of plants are regulated by five distinct plant hormone types, each of which serves a unique purpose.
1. Ethylene regulates abscission.
- There are two purposes for the hormone ethylene.
(1) aids in fruit ripening and
(2) participates in the abscission process, which results in the dropping of leaves, fruits, and flowers.
- Ethylene makes petals or fruit fall off a plant after it has finished flowering or is mature and ready to be eaten.
- thus this statement is true
2. Gibberellins do not play any role in flowering.
- gibberellins encourage plant growth.
- Scientists provide gibberellins to plants, and the plants' stems lengthen as a result.
- Gibberellins are sometimes added by gardeners or horticulture researchers to help plants grow faster.
- On the other hand, dwarf plants (tiny plants) have little gibberellins.
- Gibberellins also prevent seeds and buds from going into dormancy, which is a state of prolonged rest.
- Gibberellins indicate when a bud should open or when a seed should sprout (sprout).
- Gibberellins (GAs) affect flowering in a species-dependent manner: in long-day and biennial plants they promote flowering, whereas in other plants, including fruit trees, they inhibit it.
- thus this statement is not true
3. Auxin and cytokinin promote cell division.
- Auxins aid in plant growth.
- Apical dominance, or when the main central stem grows more vigorously than other stems and branches, is caused by auxins released at the tip of the plant.
- When the plant's tip is cut off, the auxins are gone, and the side branches start to grow.
- Additionally, auxins play a role in tropisms, or reactions to environmental stimuli.
- Auxin promotes cell division and meristem maintenance and also plays an important role in the establishment of cellular patterning.
- On the other hand, cytokinins are hormones that promote cell division in plants.
- Attempts to produce plant tissue in artificial conditions led to the discovery of cytokinins.
- Cytokinins slow down the ageing process (senescence).
- Because of this, florists occasionally add cytokinins to cut flowers to prevent wilting and ageing.
- thus this statement is true
4. Over expression of cytokinin oxidase would promote root growth.
- Consider the explanation above thus this option is not true, as cytokinin oxidase is an enzyme that catalyzes the irreversible degradation of cytokinin phytohormones.
5. ABA inhibits root growth and promotes shoot growth at low water potential.
- Ethylene is now understood to be the cause of abscission, thus abscisic acid had been given a misleading term.
- Abscisic acid's true function is to preserve dormancy by sealing the stomata, the microscopic pores in leaves that allow things to enter and exit.
- Abscisic acid instructs the stomata to close when a plant is under stress from a lack of water.
- This stops water from evaporating through the stomata.
- Abscisic acid sends a signal to the seed to stay in dormancy when the conditions are not favorable for germination.
- At low water potentials, increased endogenous Abscisic Acid maintains primary root growth and inhibits shoot growth of ex. Maize Seedlings.
- thus this statement is not true.
6. ABA promotes leaf senescence independent of ethylene.
- ABA promotes leaf senescence in an ethylene-independent manner by activating sucrose nonfermenting 1-related protein kinase 2s (SnRK2s), which subsequently phosphorylate ABA-responsive element-binding factors (ABFs) and related to ABA-Insensitive 3/VP1 (RAV1) transcription factors.
- thus this statement is true
hence the correct answer is option 1 , i.e 1, 3 and 6 statements
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The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer?
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The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer?.
The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer?.
Solutions for The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Software Development.
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ample number of questions to practice The statements about plant growth hormones that are made below: 1. Ethylene regulates abscission. 2. Gibberellins do not play any role in flowering. 3. Auxin and cytokinin promote cell division. 4. Over expression of cytokinin oxidase would promote root growth. 5. ABA inhibits root growth and promotes shoot growth at low water potential. 6. ABA promotes leaf senescence independent of ethylene. Which one of the following combination of above statements is correct?a)1, 3 and 6b)2, 3 and 4c)4, 5 and 6d)2, 4 and 5Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Software Development tests.
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