1 Auxins (from Greek 'auxein' : to grow) was first isolated from human urine.
2 IAA (Indole Acetic Acid) and IBA (Indole Butyric acid) have been isolated from plants
3 NAA (Naphthalene acetic acid) and 2,4-D(2,4-dichlorophenoxyacetic acid) are synthetic auxins
4 All are correct
Explanation:
All the given statements are correct.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337859
Auxin helps in?
1 Phloem differentiation
2 Xylem differentiation
3 Cell division
4 2 and 3
Explanation:
Auxin controls xylem differentiation and helps in cell division.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337842
Assertion : The apical bud is the only source of auxins. Reason : Removal of apical bud is the only way to promote lateral bud growth.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The apical bud is not the only source of auxins. Young developing leaves also produce auxins and it has been shown that auxins from this source may inhibit lateral bud growth. When the apical bud is removed, the lateral buds sprout. However, if a paste of auxin is painted on the cut end of the decapitated shoot, the lateral buds remain inhibited, as if the apical bud is present.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337843
Which of the following PGR is widely used to kill dicotyledonous weeds?
1 IAA
2 NAA
3 2, 4-D
4 ABA
Explanation:
2, 4-D, widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337844
Statement A : Auxin help to prevent fruit and leaf drop at early stages. Statement B : Auxin promotes the abscission of older mature leaves and fruits.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
1 Auxins (from Greek 'auxein' : to grow) was first isolated from human urine.
2 IAA (Indole Acetic Acid) and IBA (Indole Butyric acid) have been isolated from plants
3 NAA (Naphthalene acetic acid) and 2,4-D(2,4-dichlorophenoxyacetic acid) are synthetic auxins
4 All are correct
Explanation:
All the given statements are correct.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337859
Auxin helps in?
1 Phloem differentiation
2 Xylem differentiation
3 Cell division
4 2 and 3
Explanation:
Auxin controls xylem differentiation and helps in cell division.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337842
Assertion : The apical bud is the only source of auxins. Reason : Removal of apical bud is the only way to promote lateral bud growth.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The apical bud is not the only source of auxins. Young developing leaves also produce auxins and it has been shown that auxins from this source may inhibit lateral bud growth. When the apical bud is removed, the lateral buds sprout. However, if a paste of auxin is painted on the cut end of the decapitated shoot, the lateral buds remain inhibited, as if the apical bud is present.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337843
Which of the following PGR is widely used to kill dicotyledonous weeds?
1 IAA
2 NAA
3 2, 4-D
4 ABA
Explanation:
2, 4-D, widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337844
Statement A : Auxin help to prevent fruit and leaf drop at early stages. Statement B : Auxin promotes the abscission of older mature leaves and fruits.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
1 Auxins (from Greek 'auxein' : to grow) was first isolated from human urine.
2 IAA (Indole Acetic Acid) and IBA (Indole Butyric acid) have been isolated from plants
3 NAA (Naphthalene acetic acid) and 2,4-D(2,4-dichlorophenoxyacetic acid) are synthetic auxins
4 All are correct
Explanation:
All the given statements are correct.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337859
Auxin helps in?
1 Phloem differentiation
2 Xylem differentiation
3 Cell division
4 2 and 3
Explanation:
Auxin controls xylem differentiation and helps in cell division.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337842
Assertion : The apical bud is the only source of auxins. Reason : Removal of apical bud is the only way to promote lateral bud growth.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The apical bud is not the only source of auxins. Young developing leaves also produce auxins and it has been shown that auxins from this source may inhibit lateral bud growth. When the apical bud is removed, the lateral buds sprout. However, if a paste of auxin is painted on the cut end of the decapitated shoot, the lateral buds remain inhibited, as if the apical bud is present.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337843
Which of the following PGR is widely used to kill dicotyledonous weeds?
1 IAA
2 NAA
3 2, 4-D
4 ABA
Explanation:
2, 4-D, widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337844
Statement A : Auxin help to prevent fruit and leaf drop at early stages. Statement B : Auxin promotes the abscission of older mature leaves and fruits.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOXI15: PLANT GROWTH AND DEVELOPMENT
337858
Choose the correct statements.
1 Auxins (from Greek 'auxein' : to grow) was first isolated from human urine.
2 IAA (Indole Acetic Acid) and IBA (Indole Butyric acid) have been isolated from plants
3 NAA (Naphthalene acetic acid) and 2,4-D(2,4-dichlorophenoxyacetic acid) are synthetic auxins
4 All are correct
Explanation:
All the given statements are correct.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337859
Auxin helps in?
1 Phloem differentiation
2 Xylem differentiation
3 Cell division
4 2 and 3
Explanation:
Auxin controls xylem differentiation and helps in cell division.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337842
Assertion : The apical bud is the only source of auxins. Reason : Removal of apical bud is the only way to promote lateral bud growth.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The apical bud is not the only source of auxins. Young developing leaves also produce auxins and it has been shown that auxins from this source may inhibit lateral bud growth. When the apical bud is removed, the lateral buds sprout. However, if a paste of auxin is painted on the cut end of the decapitated shoot, the lateral buds remain inhibited, as if the apical bud is present.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337843
Which of the following PGR is widely used to kill dicotyledonous weeds?
1 IAA
2 NAA
3 2, 4-D
4 ABA
Explanation:
2, 4-D, widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337844
Statement A : Auxin help to prevent fruit and leaf drop at early stages. Statement B : Auxin promotes the abscission of older mature leaves and fruits.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
1 Auxins (from Greek 'auxein' : to grow) was first isolated from human urine.
2 IAA (Indole Acetic Acid) and IBA (Indole Butyric acid) have been isolated from plants
3 NAA (Naphthalene acetic acid) and 2,4-D(2,4-dichlorophenoxyacetic acid) are synthetic auxins
4 All are correct
Explanation:
All the given statements are correct.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337859
Auxin helps in?
1 Phloem differentiation
2 Xylem differentiation
3 Cell division
4 2 and 3
Explanation:
Auxin controls xylem differentiation and helps in cell division.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337842
Assertion : The apical bud is the only source of auxins. Reason : Removal of apical bud is the only way to promote lateral bud growth.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The apical bud is not the only source of auxins. Young developing leaves also produce auxins and it has been shown that auxins from this source may inhibit lateral bud growth. When the apical bud is removed, the lateral buds sprout. However, if a paste of auxin is painted on the cut end of the decapitated shoot, the lateral buds remain inhibited, as if the apical bud is present.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337843
Which of the following PGR is widely used to kill dicotyledonous weeds?
1 IAA
2 NAA
3 2, 4-D
4 ABA
Explanation:
2, 4-D, widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners.
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337844
Statement A : Auxin help to prevent fruit and leaf drop at early stages. Statement B : Auxin promotes the abscission of older mature leaves and fruits.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.