Prepare for NEET Biology Anatomy of Flowering Plants with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert insights on plant tissues and structures.
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
The concept of 'Dedifferentiation' in relation to meristem formation is best exemplified by:
Activity of the root apical meristem
Formation of interfascicular cambium from parenchyma cells
Development of phellogen from the epidermis
Differentiation of xylem vessels from procambium
Which of the following combinations of cell types are exclusively found in complex tissues and not simple tissues?
Sieve tubes, companion cells, and tracheids
Parenchyma, collenchyma, and sclerenchyma
Xylem parenchyma, phloem parenchyma, and sclereids
Tracheids, vessels, and xylem fibres
The protoxylem and protophloem in a dicot stem differ primarily in their:
Maturation time and position relative to the metaxylem and metaphloem
Cell wall composition and function
Presence or absence of living cells at maturity
Overall size and shape of their conducting elements
In a conjoint, collateral, and open vascular bundle, which tissue separates the xylem and phloem?
Cambium
Pith
Cortex
Pericycle
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
A researcher is studying the transport of water in a genetically modified plant where the lignin biosynthesis pathway is disrupted. Which of the following is the MOST likely consequence observed in the xylem of this plant?
Increased tensile strength of xylem vessels and enhanced water transport
Collapsed xylem vessels and reduced water transport efficiency
No significant change in xylem structure or water transport
Increased flexibility of xylem vessels and improved water transport under stress
Which of the following BEST explains why the ascent of sap in tall trees is primarily attributed to the cohesion-tension theory rather than root pressure?
Root pressure only operates during the night
Root pressure is primarily involved in nutrient transport, not water transport
Root pressure alone cannot generate sufficient pressure to overcome the gravitational force in tall trees
The cohesion-tension theory is more energy-efficient than root pressure
The specific arrangement of sieve elements and companion cells in phloem tissue, where a single companion cell is associated with multiple sieve elements, is MOST characteristic of which plant group?
Angiosperms
Gymnosperms
Bryophytes
Pteridophytes
