Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
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.
In a dicot stem, the pith is located:
Outside the vascular bundles
Between the xylem and phloem
In the center, surrounded by the vascular bundles
Within the vascular bundles
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 a dicot stem undergoing secondary growth, which of the following is the FIRST to differentiate from the cells produced by the vascular cambium towards the pith?
Secondary xylem
Secondary phloem
Phelloderm
Phellem
The interfascicular cambium in dicot stems originates from:
Pericycle cells
Medullary ray cells
Phloem parenchyma cells
Xylem parenchyma cells
Which tissue in a mature, woody dicot stem is primarily responsible for transporting water and minerals absorbed by the roots?
Heartwood
Sapwood
Pith
Cortex
Lenticels in the periderm of a woody dicot stem primarily facilitate:
Water transport
Food storage
Gaseous exchange
Mechanical support
In a dicot stem undergoing secondary growth, the cells of the vascular cambium divide to produce secondary xylem and phloem. If a tangential section is taken through the secondary xylem, what would be the predominant cell type observed in terms of arrangement?
Radially arranged parenchyma cells
Axially elongated tracheary elements
Isometric sclerenchyma cells
Clustered secretory cells
Which of the following characteristics distinguishes the periderm from the epidermis in a woody dicot stem?
Presence of stomata
Single-layered structure
Presence of suberized cells
Origin from the ground meristem
Which of the following features distinguishes a monocot vascular bundle from a dicot vascular bundle in the stem?
Presence of a well-developed pith and a ring of vascular bundles
Presence of a sclerenchymatous bundle sheath and absence of cambium
Presence of a continuous vascular cylinder and presence of cambium
Presence of conjoint and open vascular bundles with a prominent pericycle
