337813
Which one of the following generally acts as an antagonist to gibberellins?
1 IAA
2 Zeatin
3 Ethylene
4 ABA
Explanation:
\(\mathrm{ABA}\) acts as antagonist to gibberellins.
AIPMT - 2014
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337814
Match the following: Column I Column II A IAA P Herring sperm DNA B ABA Q Bolting C Ethylene R Stomatal closure D GA S Weed-free lawns E Cytokinins T Ripening of fruits
1 \({\rm{A - S,\;B - R,C - T,D - Q,E - P}}\)
2 \({\rm{A - T,\;B - R,C - S,D - Q,E - P}}\)
3 \({\rm{A - S,\;B - P,C - T,D - R,E - Q}}\)
4 \({\rm{A - T,\;B - R,C - Q,D - P,E - S}}\)
Explanation:
IAA-Weed free lawns ABA - Stomatal closure Ethylene - Ripening of fruits GA - Bolting Cytokinins - Herring sperm of DNA
NCERT Exemplar
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337815
Identify the mismatch
1 Promotion of flowering in pineapple Ethylene
2 Seed dormancy - ABA
3 Apical dominance - Auxins
4 Senescence in leaves - Ethylene
Explanation:
Auxins promote flowering e.g. in pineapples.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337816
Why is ABA called stress hormone?
1 Removes various stresses from plant
2 Increase tolerance of plant to various kind of stresses
3 Both (1) and (2)
4 None of these
Explanation:
ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337817
Statement A : ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants. Statement B : In most situations, ABA acts as a protagonist to GAs.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In most situations, ABA acts as an antagonist to GAs.
337813
Which one of the following generally acts as an antagonist to gibberellins?
1 IAA
2 Zeatin
3 Ethylene
4 ABA
Explanation:
\(\mathrm{ABA}\) acts as antagonist to gibberellins.
AIPMT - 2014
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337814
Match the following: Column I Column II A IAA P Herring sperm DNA B ABA Q Bolting C Ethylene R Stomatal closure D GA S Weed-free lawns E Cytokinins T Ripening of fruits
1 \({\rm{A - S,\;B - R,C - T,D - Q,E - P}}\)
2 \({\rm{A - T,\;B - R,C - S,D - Q,E - P}}\)
3 \({\rm{A - S,\;B - P,C - T,D - R,E - Q}}\)
4 \({\rm{A - T,\;B - R,C - Q,D - P,E - S}}\)
Explanation:
IAA-Weed free lawns ABA - Stomatal closure Ethylene - Ripening of fruits GA - Bolting Cytokinins - Herring sperm of DNA
NCERT Exemplar
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337815
Identify the mismatch
1 Promotion of flowering in pineapple Ethylene
2 Seed dormancy - ABA
3 Apical dominance - Auxins
4 Senescence in leaves - Ethylene
Explanation:
Auxins promote flowering e.g. in pineapples.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337816
Why is ABA called stress hormone?
1 Removes various stresses from plant
2 Increase tolerance of plant to various kind of stresses
3 Both (1) and (2)
4 None of these
Explanation:
ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337817
Statement A : ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants. Statement B : In most situations, ABA acts as a protagonist to GAs.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In most situations, ABA acts as an antagonist to GAs.
337813
Which one of the following generally acts as an antagonist to gibberellins?
1 IAA
2 Zeatin
3 Ethylene
4 ABA
Explanation:
\(\mathrm{ABA}\) acts as antagonist to gibberellins.
AIPMT - 2014
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337814
Match the following: Column I Column II A IAA P Herring sperm DNA B ABA Q Bolting C Ethylene R Stomatal closure D GA S Weed-free lawns E Cytokinins T Ripening of fruits
1 \({\rm{A - S,\;B - R,C - T,D - Q,E - P}}\)
2 \({\rm{A - T,\;B - R,C - S,D - Q,E - P}}\)
3 \({\rm{A - S,\;B - P,C - T,D - R,E - Q}}\)
4 \({\rm{A - T,\;B - R,C - Q,D - P,E - S}}\)
Explanation:
IAA-Weed free lawns ABA - Stomatal closure Ethylene - Ripening of fruits GA - Bolting Cytokinins - Herring sperm of DNA
NCERT Exemplar
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337815
Identify the mismatch
1 Promotion of flowering in pineapple Ethylene
2 Seed dormancy - ABA
3 Apical dominance - Auxins
4 Senescence in leaves - Ethylene
Explanation:
Auxins promote flowering e.g. in pineapples.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337816
Why is ABA called stress hormone?
1 Removes various stresses from plant
2 Increase tolerance of plant to various kind of stresses
3 Both (1) and (2)
4 None of these
Explanation:
ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337817
Statement A : ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants. Statement B : In most situations, ABA acts as a protagonist to GAs.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In most situations, ABA acts as an antagonist to GAs.
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BIOXI15: PLANT GROWTH AND DEVELOPMENT
337813
Which one of the following generally acts as an antagonist to gibberellins?
1 IAA
2 Zeatin
3 Ethylene
4 ABA
Explanation:
\(\mathrm{ABA}\) acts as antagonist to gibberellins.
AIPMT - 2014
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337814
Match the following: Column I Column II A IAA P Herring sperm DNA B ABA Q Bolting C Ethylene R Stomatal closure D GA S Weed-free lawns E Cytokinins T Ripening of fruits
1 \({\rm{A - S,\;B - R,C - T,D - Q,E - P}}\)
2 \({\rm{A - T,\;B - R,C - S,D - Q,E - P}}\)
3 \({\rm{A - S,\;B - P,C - T,D - R,E - Q}}\)
4 \({\rm{A - T,\;B - R,C - Q,D - P,E - S}}\)
Explanation:
IAA-Weed free lawns ABA - Stomatal closure Ethylene - Ripening of fruits GA - Bolting Cytokinins - Herring sperm of DNA
NCERT Exemplar
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337815
Identify the mismatch
1 Promotion of flowering in pineapple Ethylene
2 Seed dormancy - ABA
3 Apical dominance - Auxins
4 Senescence in leaves - Ethylene
Explanation:
Auxins promote flowering e.g. in pineapples.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337816
Why is ABA called stress hormone?
1 Removes various stresses from plant
2 Increase tolerance of plant to various kind of stresses
3 Both (1) and (2)
4 None of these
Explanation:
ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337817
Statement A : ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants. Statement B : In most situations, ABA acts as a protagonist to GAs.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In most situations, ABA acts as an antagonist to GAs.
337813
Which one of the following generally acts as an antagonist to gibberellins?
1 IAA
2 Zeatin
3 Ethylene
4 ABA
Explanation:
\(\mathrm{ABA}\) acts as antagonist to gibberellins.
AIPMT - 2014
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337814
Match the following: Column I Column II A IAA P Herring sperm DNA B ABA Q Bolting C Ethylene R Stomatal closure D GA S Weed-free lawns E Cytokinins T Ripening of fruits
1 \({\rm{A - S,\;B - R,C - T,D - Q,E - P}}\)
2 \({\rm{A - T,\;B - R,C - S,D - Q,E - P}}\)
3 \({\rm{A - S,\;B - P,C - T,D - R,E - Q}}\)
4 \({\rm{A - T,\;B - R,C - Q,D - P,E - S}}\)
Explanation:
IAA-Weed free lawns ABA - Stomatal closure Ethylene - Ripening of fruits GA - Bolting Cytokinins - Herring sperm of DNA
NCERT Exemplar
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337815
Identify the mismatch
1 Promotion of flowering in pineapple Ethylene
2 Seed dormancy - ABA
3 Apical dominance - Auxins
4 Senescence in leaves - Ethylene
Explanation:
Auxins promote flowering e.g. in pineapples.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337816
Why is ABA called stress hormone?
1 Removes various stresses from plant
2 Increase tolerance of plant to various kind of stresses
3 Both (1) and (2)
4 None of these
Explanation:
ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337817
Statement A : ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants. Statement B : In most situations, ABA acts as a protagonist to GAs.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In most situations, ABA acts as an antagonist to GAs.
