Q. No.When cambial ring becomes active, the cells cut off toward pith mature into
(1) Primary xylem
(2) Secondary xylem
(3) Primary phloem
(4) Secondary phloem
(1) Primary xylem
(2) Secondary xylem
(3) Primary phloem
(4) Secondary phloem
When cambial rings become active and the cells cut off towards periphery mature into
(1) Secondary phloem
(2) Primary phloem
(3) Primary xylem
(4) Secondary xylem
The cambium is generally more active on the _________ side than the _________ side.
(1) Inner, outer
(2) Outer, inner
(3) Radial, inner
(4) Radial, outer
The primary and secondary phloem gets gradually crushed due to the continued formation and accumulation of _________.
(1) Secondary xylem
(2) Resin
(3) Wax
(4) Bark
In dicot stem, at some places the cambium forms a narrow band of parenchyma which passes through the secondary xylem and secondary phloem in radial direction these are called _________.
(1) Secondary medullary rays
(2) Rays
(3) Primary medullary rays
(4) Tertiary medullary rays
The wood formed during spring is called
(1) Early wood
(2) Late wood
(3) Autumn wood
(4) Summer wood
The wood formed during winter is called
(1) Early wood
(2) Spring wood
(3) Autumn wood
(4) Intermediate wood
Annual ring appears due to
(1) Radial xylem
(2) Radial phloem
(3) Centric wood
(4) Alternate concentric rings
The region of secondary xylem which comprise dead element with highly lignified walls is called
(1) Casparian strip
(2) Heartwood
(3) Sapwood
(4) Bark
The peripheral region of secondary xylem lighter in colour is
(1) Sapwood
(2) Heartwood
(3) Annular wood
(4) Bark wood
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