In a dicot root undergoing secondary growth, the phellogen typically originates from which tissue layer?
Cortex
Endodermis
Pericycle
Phloem
Related Questions
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
Water impermeable, waxy material secreted by endodermal cells is called
Casparian strip
Suberin
Cutin
Lignin
The layer of cells outside the phloem meant for giving rise to the root branches is called
Cambium
Carpus
Endodermis
Pericycle
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
Absence of secondary xylem
Absence of secondary phloem
Presence of cortex
Position of protoxylem
The passage cells in the endodermis of a dicot root are characterized by the absence of which Casparian strip component?
Lignin
Suberin lamellae
Cellulose
Pectin
Mark the correct sequence of layers found in root anatomy.
Epiblema, cortex, endodermis, pericycle
Cortex, epiblema, pericycle, endodermis
Epiblema, cortex, pericycle, endodermis
Cortex, epiblema, endodermis, epidermis
Which of the following substances is prevented from entering the xylem through the apoplast pathway due to the presence of Casparian strips?
Sugars
Hormones
Water and dissolved minerals
Oxygen
What type of xylem arrangement is typically found in dicot roots?
Scattered
Conjoint
Radial
Collateral
Intercellular spaces are found in …A… region. Intercellular spaces are absent in …B… region. Choose the correct option for A and B
A-cortex, B-endodermis
A-endodermis, B-cortex
A-endodermis, B-pericycle
A-cortex, B-pericycle
The casparian strip is located in which tissue layer of the dicot root?
Cortex
Pericycle
Endodermis
Epidermis
