Q. No.In grasses certain adaxial epidermal cells along the vein modify themselves into large, empty, colourless cells called ________.
(1) Bark
(2) Bulliform cells
(3) Bundle sheath cells
(4) Spongy mesophyll cells
(1) Bark
(2) Bulliform cells
(3) Bundle sheath cells
(4) Spongy mesophyll cells
Bulliform cells help in
(1) Heat resistance
(2) Minimizing water loss
(3) Maintaining ion balance
(4) Mineral acquisition
The similar size of vascular bundle in monocot leaf is due to
1. Reticulate venation
2. Parallel venation
3. Branched venation
4. Radial venation
The tissue involved in secondary growth are
(1) Vascular cambium
(2) Cork cambium
(3) Pith
(4) Both A and B
In dicot stem the cells of cambium present between primary xylem and primary phloem is the ___________.
(1) Intrafascicular cambium
(2) Interfascicular cambium
(3) Metafascicular cambium
(4) Radial cambium
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
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
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