Select the characters which are not applicable to the anatomy of dicot roots: (a) Conjunctive tissue present (b) Presence of protein compound in casparian strips (c) Polyarch xylem bundles (d) Presence of pericycle
Select the characters which are not applicable to the anatomy of dicot roots: (a) Conjunctive tissue present (b) Presence of protein compound in casparian strips (c) Polyarch xylem bundles (d) Presence of pericycle
The correct option is E (b) and (c)
a) Conjuctive present – applicable, because it is present between xylem and phloem.
b) Presence of protein compound in Casparian strips – not applicable, because, a lingo-suberised substance is present on the radial and tangential walls of the endodermis.
c) Polyarch xylem bundles – not applicable, because , in the stele of dicot root two to four xylem strands are present. So the stele is diarch to tetrarch.
d) Presence of pericycle – applicable – because, pericycle is outer most layer of the stele, and it is parenchymatous, take part in the production of lateral roots and vascular cambium.
So the correct option is, ‘b and c’
a) Conjuctive present – applicable, because it is present between xylem and phloem.
b) Presence of protein compound in Casparian strips – not applicable, because, a lingo-suberised substance is present on the radial and tangential walls of the endodermis.
c) Polyarch xylem bundles – not applicable, because , in the stele of dicot root two to four xylem strands are present. So the stele is diarch to tetrarch.
d) Presence of pericycle – applicable – because, pericycle is outer most layer of the stele, and it is parenchymatous, take part in the production of lateral roots and vascular cambium.
So the correct option is, ‘b and c’
