Q. No.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
(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
Phellogen, phellem and phelloderm are collectively known as
(1) Phellogram
(2) Periderm
(3) Cork
(4) Phalanges
Bark that is formed early in season is called __________ bark.
(1) Hard
(2) Soft
(3) Turbid
(4) Lenticels
Bark formed towards the end of the season is called ________ bark.
(1) Soft
(2) Hard
(3) Turbid
(4) Rigid
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