Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which of the following statements regarding the anomalous secondary growth in Boerhaavia is INCORRECT?
A variant of cambium outside the vascular bundles
Concentric rings of secondary vascular bundles
Presence of medullary bundles
Inverted vascular bundles
In a dicot stem undergoing secondary growth, which tissue is primarily responsible for the increase in girth?
Cork Cambium
Vascular Cambium
Apical Meristem
Intercalary Meristem
The 'open' vascular bundles found in dicot stems are characterized by:
Scattered arrangement of xylem and phloem with no cambium.
The presence of cambium between xylem and phloem, allowing for secondary growth.
Joint, collateral arrangement of xylem and phloem with no cambium.
Concentric arrangement of xylem and phloem.
Which combination of meristems is responsible for producing secondary vascular tissues?
Apical meristem and intercalary meristem
Lateral meristem and apical meristem
Vascular cambium and cork cambium
Intercalary meristem and cork cambium
Which statement accurately describes the difference between the fascicular and interfascicular cambium?
Fascicular cambium produces secondary xylem, while interfascicular cambium produces secondary phloem.
Fascicular cambium is present in monocots, while interfascicular cambium is present in dicots.
Fascicular cambium arises within vascular bundles, while interfascicular cambium arises in the medullary rays.
Fascicular cambium is a primary meristem, while interfascicular cambium is a secondary meristem.
In plants exhibiting unusual secondary growth, like in Bougainvillea, the additional cambia arise from:
Residual procambium cells
Cells of the pith
Cells of the cortex or pericycle
Differentiated xylem parenchyma
Which specific characteristic of tyloses contributes to the blockage of xylem vessels in heartwood?
Protrusion of parenchyma cells into vessel lumens
Deposition of lignin in the vessel walls
Accumulation of tannins and resins
Collapse of vessel elements due to negative pressure
During secondary growth in dicot roots, which tissue initiates the formation of the vascular cambium?
The innermost layer of the cortex
The pericycle cells opposite to the protoxylem poles
The pith parenchyma cells
Partly from the pericycle and partly from the conjunctive parenchyma cells lying just below the phloem bundles
In a dicot root undergoing secondary growth, the phellogen typically originates from which tissue layer?
Cortex
Endodermis
Pericycle
Phloem
The multilayered pericycle in a monocot root contributes significantly to:
Lateral root formation
Secondary growth
Vascular cambium formation
Primary xylem development
