D Abscisic acid is a derivative of carotenoid. - Abscisic acid (ABA) is a plant hormone that is also as abscisin II or dormin. - Carotenoids are the source of abscisic acid. - Carotenoids are essential pigments in photosynthetic organs along with chlorophylls and acts as antioxidants, photo protector, precursors of plant hormones in non - photosynthetic organs of plants and colour attractants.
[AP EAMCET-12.07.2022 Shift-II AIPMT-2009]
Plant growth and development
166850
Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :
1 Cytokinin
2 $\mathrm{ABA}$
3 Gibberellin
4 Ethylene
Explanation:
D Ethylene- Ethylene is a simple gaseous PGR (Plant growth regulator). The hormone finds its use in increasing the yield of cucumber plants by increasing the female flower formation. So the correct answer is Ethylene $\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)$. Cytokinin- Cytokinins are plant hormones that promote cell division or cytokinesis in plant roots and shoots. Gibberllins- Gibberllins are plant hormones that regulate development processes including stem elongation germination dormancy flowering flower development and leaf and fruit senescence. ABA- Abscisic acid increases resistance of plants to cold and other types of stresses like drought and water logging etc. It is therefore also known as stress hormone.
[NEET-2022]
Plant growth and development
166854
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1 Gibberellin and Cytokinin
2 Gibberellin and Abscisic acid
3 Cytokinin and Abscisic acid
4 Auxin and Ethylene
Explanation:
D Auxin and Ethylene combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield. Auxin -: Auxin promotes pineapple flowering. Ethylene -: Ethylene is a gaseous plant hormone. It also helps in synchronization of flowering and fruit set up in pineapple. Hence, the (d) one is the right answer.
[NEET-2019]
Plant growth and development
166866
How does pruning help in making the hedge dense?
1 It induces the differentiation of new shoots from the rootstock
2 It frees auxiliary buds from apical dominance
3 The apical shoot grows faster after pruning
4 It releases wound hormones
Explanation:
B Pruning is the process of cutting shoot tips to promote the lateral growth of branches. - When pruning frees auxiliary buds from apical dominance it helps in making the hedge dense. Pruning is essential for maintaining attractive and healthy trees and shrubs. - Apical dominance is the phenomenon by which presence of apical buds does not allow the nearby lateral buds to grow. Apical buds produce high concentration of hormone auxin which inhibits the growth of lateral buds. When the apical buds are removed by pruning, the lateral buds sprout. This produces dense bushy growth.
D Abscisic acid is a derivative of carotenoid. - Abscisic acid (ABA) is a plant hormone that is also as abscisin II or dormin. - Carotenoids are the source of abscisic acid. - Carotenoids are essential pigments in photosynthetic organs along with chlorophylls and acts as antioxidants, photo protector, precursors of plant hormones in non - photosynthetic organs of plants and colour attractants.
[AP EAMCET-12.07.2022 Shift-II AIPMT-2009]
Plant growth and development
166850
Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :
1 Cytokinin
2 $\mathrm{ABA}$
3 Gibberellin
4 Ethylene
Explanation:
D Ethylene- Ethylene is a simple gaseous PGR (Plant growth regulator). The hormone finds its use in increasing the yield of cucumber plants by increasing the female flower formation. So the correct answer is Ethylene $\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)$. Cytokinin- Cytokinins are plant hormones that promote cell division or cytokinesis in plant roots and shoots. Gibberllins- Gibberllins are plant hormones that regulate development processes including stem elongation germination dormancy flowering flower development and leaf and fruit senescence. ABA- Abscisic acid increases resistance of plants to cold and other types of stresses like drought and water logging etc. It is therefore also known as stress hormone.
[NEET-2022]
Plant growth and development
166854
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1 Gibberellin and Cytokinin
2 Gibberellin and Abscisic acid
3 Cytokinin and Abscisic acid
4 Auxin and Ethylene
Explanation:
D Auxin and Ethylene combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield. Auxin -: Auxin promotes pineapple flowering. Ethylene -: Ethylene is a gaseous plant hormone. It also helps in synchronization of flowering and fruit set up in pineapple. Hence, the (d) one is the right answer.
[NEET-2019]
Plant growth and development
166866
How does pruning help in making the hedge dense?
1 It induces the differentiation of new shoots from the rootstock
2 It frees auxiliary buds from apical dominance
3 The apical shoot grows faster after pruning
4 It releases wound hormones
Explanation:
B Pruning is the process of cutting shoot tips to promote the lateral growth of branches. - When pruning frees auxiliary buds from apical dominance it helps in making the hedge dense. Pruning is essential for maintaining attractive and healthy trees and shrubs. - Apical dominance is the phenomenon by which presence of apical buds does not allow the nearby lateral buds to grow. Apical buds produce high concentration of hormone auxin which inhibits the growth of lateral buds. When the apical buds are removed by pruning, the lateral buds sprout. This produces dense bushy growth.
D Abscisic acid is a derivative of carotenoid. - Abscisic acid (ABA) is a plant hormone that is also as abscisin II or dormin. - Carotenoids are the source of abscisic acid. - Carotenoids are essential pigments in photosynthetic organs along with chlorophylls and acts as antioxidants, photo protector, precursors of plant hormones in non - photosynthetic organs of plants and colour attractants.
[AP EAMCET-12.07.2022 Shift-II AIPMT-2009]
Plant growth and development
166850
Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :
1 Cytokinin
2 $\mathrm{ABA}$
3 Gibberellin
4 Ethylene
Explanation:
D Ethylene- Ethylene is a simple gaseous PGR (Plant growth regulator). The hormone finds its use in increasing the yield of cucumber plants by increasing the female flower formation. So the correct answer is Ethylene $\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)$. Cytokinin- Cytokinins are plant hormones that promote cell division or cytokinesis in plant roots and shoots. Gibberllins- Gibberllins are plant hormones that regulate development processes including stem elongation germination dormancy flowering flower development and leaf and fruit senescence. ABA- Abscisic acid increases resistance of plants to cold and other types of stresses like drought and water logging etc. It is therefore also known as stress hormone.
[NEET-2022]
Plant growth and development
166854
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1 Gibberellin and Cytokinin
2 Gibberellin and Abscisic acid
3 Cytokinin and Abscisic acid
4 Auxin and Ethylene
Explanation:
D Auxin and Ethylene combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield. Auxin -: Auxin promotes pineapple flowering. Ethylene -: Ethylene is a gaseous plant hormone. It also helps in synchronization of flowering and fruit set up in pineapple. Hence, the (d) one is the right answer.
[NEET-2019]
Plant growth and development
166866
How does pruning help in making the hedge dense?
1 It induces the differentiation of new shoots from the rootstock
2 It frees auxiliary buds from apical dominance
3 The apical shoot grows faster after pruning
4 It releases wound hormones
Explanation:
B Pruning is the process of cutting shoot tips to promote the lateral growth of branches. - When pruning frees auxiliary buds from apical dominance it helps in making the hedge dense. Pruning is essential for maintaining attractive and healthy trees and shrubs. - Apical dominance is the phenomenon by which presence of apical buds does not allow the nearby lateral buds to grow. Apical buds produce high concentration of hormone auxin which inhibits the growth of lateral buds. When the apical buds are removed by pruning, the lateral buds sprout. This produces dense bushy growth.
D Abscisic acid is a derivative of carotenoid. - Abscisic acid (ABA) is a plant hormone that is also as abscisin II or dormin. - Carotenoids are the source of abscisic acid. - Carotenoids are essential pigments in photosynthetic organs along with chlorophylls and acts as antioxidants, photo protector, precursors of plant hormones in non - photosynthetic organs of plants and colour attractants.
[AP EAMCET-12.07.2022 Shift-II AIPMT-2009]
Plant growth and development
166850
Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :
1 Cytokinin
2 $\mathrm{ABA}$
3 Gibberellin
4 Ethylene
Explanation:
D Ethylene- Ethylene is a simple gaseous PGR (Plant growth regulator). The hormone finds its use in increasing the yield of cucumber plants by increasing the female flower formation. So the correct answer is Ethylene $\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)$. Cytokinin- Cytokinins are plant hormones that promote cell division or cytokinesis in plant roots and shoots. Gibberllins- Gibberllins are plant hormones that regulate development processes including stem elongation germination dormancy flowering flower development and leaf and fruit senescence. ABA- Abscisic acid increases resistance of plants to cold and other types of stresses like drought and water logging etc. It is therefore also known as stress hormone.
[NEET-2022]
Plant growth and development
166854
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1 Gibberellin and Cytokinin
2 Gibberellin and Abscisic acid
3 Cytokinin and Abscisic acid
4 Auxin and Ethylene
Explanation:
D Auxin and Ethylene combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield. Auxin -: Auxin promotes pineapple flowering. Ethylene -: Ethylene is a gaseous plant hormone. It also helps in synchronization of flowering and fruit set up in pineapple. Hence, the (d) one is the right answer.
[NEET-2019]
Plant growth and development
166866
How does pruning help in making the hedge dense?
1 It induces the differentiation of new shoots from the rootstock
2 It frees auxiliary buds from apical dominance
3 The apical shoot grows faster after pruning
4 It releases wound hormones
Explanation:
B Pruning is the process of cutting shoot tips to promote the lateral growth of branches. - When pruning frees auxiliary buds from apical dominance it helps in making the hedge dense. Pruning is essential for maintaining attractive and healthy trees and shrubs. - Apical dominance is the phenomenon by which presence of apical buds does not allow the nearby lateral buds to grow. Apical buds produce high concentration of hormone auxin which inhibits the growth of lateral buds. When the apical buds are removed by pruning, the lateral buds sprout. This produces dense bushy growth.
