Latest questions in this category.
Heterophylly, the presence of different leaf types in the same plant (e.g., coriander), is an example of developmental plasticity.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Ethylene promotes flowering in mango and is widely used to synchronize fruit set.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins are produced in root tips and promote cell division and shoot growth. They delay, not promote, leaf senescence.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Ethylene promotes, not inhibits, flower senescence. It is also known for fruit ripening and promoting abscission.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins primarily promote shoot growth, not root growth. They delay senescence and promote cell division.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Lateral meristems, such as vascular cambium and cork cambium, contribute to secondary growth, increasing girth.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Abscisic acid induces seed dormancy, helping seeds survive unfavorable conditions. Cytokinins promote, not inhibit, cell division, and ethylene promotes, not delays, fruit ripening.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins delay senescence (aging) and promote cell division, making them essential for shoot formation in tissue culture.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Ethylene induces apical hook formation in dicot seedlings to protect the shoot tip during germination.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinin was discovered by F. Skoog and co-workers during experiments on tobacco stem callus proliferation.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins delay, not promote, leaf abscission. Ethylene promotes abscission and senescence.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Abscisic acid (ABA) is called the stress hormone as it helps plants respond to drought by closing stomata and inducing dormancy.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
