60 public questions tagged with this topic.
Actinomorphic flowers, like mustard and datura, can be divided into two equal halves in multiple planes. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.
Aestivation refers to the mode of arrangement of sepals or petals in a floral bud, which can be valvate, twisted, imbricate, or vexillary. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.
Strawberry is an aggregate fruit, meaning it develops from multiple ovaries of a single flower. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Stilt roots arise from lower nodes and provide mechanical support in plants like maize and sugarcane. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Pneumatophores help in gaseous exchange, not in water absorption. They are found in mangrove plants. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -
Phyllotaxy describes geometric arrangement of leaves, bracts, branches, or floral organs around shoot axis such as spiral arrangement with golden angle approximately 137.5 degrees, opposite decussate pairs, alternate distichous, or whorled patterns producing remarkable regularity. It emerges from positioning of new primordia in peripheral zone of shoot apical meristem where auxin maxima formed by polar PIN1 localization mark incipient organ sites. Auxin activates MONOPTEROS and represses CUC boundary genes, while mechanical buckling of epidermis and cytokinin fields refine periodic spacing, op
Ref: Reinhardt et al., Nature 2003; Gilbert Plant Dev: phyllotaxy is leaf arrangement pattern generated by auxin-PIN1 maxima.
Environmental heterophylly occurs when the shape of leaves changes in response to environmental conditions, such as in buttercup plants.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Developmental heterophylly is observed in coriander, where leaves of juvenile and mature plants differ.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Plasticity is the ability of a plant to produce different structures from the same meristem depending on environmental or developmental conditions.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Growth - Phases Differentiation Dedifferentiation Redifferentiation
Buttercup exhibits environmental heterophylly, where leaves have different forms when produced in air or water.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Growth - Phases Differentiation Dedifferentiation Redifferentiation
China rose exhibits axile placentation, not marginal placentation.
Ref: NCERT Class 11 Biology Chapter 5: Morphology of Flowering Plants Flower - Symmetry Aestivation Androecium Gynoecium Placentation
Actinomorphic flowers, such as mustard, can be divided into equal halves in multiple planes.
Ref: NCERT Class 11 Biology Chapter 5: Morphology of Flowering Plants Flower - Symmetry Aestivation Androecium Gynoecium Placentation
