Quiescent centre is present in the
  • apical meristem
  • shoot meristem
  • lateral meristem
  • root meristem
Closed vascular bundles lacks
  • pith
  • xylem
  • cambium
  • xylem vessels
Which of the following is not a feature of spring wood?
  • Color of the wood is light.
  • Density is less.
  • Cambium is active.
  • Lesser number of xylary elements.
In a monocot leaf
  • bulliform cells are absent from the eqidermis
  • veins from a network
  • mesophyll is well differentiated into palisade and spongy parenchyma
  • mesophyll is not differentiated into palisade and spongy parenchyma
A. T. S. of a young dicot root can be distinguished from that of a young dicot stem by the presence of
  • radial arrangement of xylem and phloem
  • collateral arrangement of xylem and phloem
  • interfascicular cambium
  • intrafascicular cambium
Fusifrom initial cells of cambium from
  • vascular rays
  • tracheary elements
  • ray parenchyma
  • phloem parenchyma
Callose deposition is found in
  • tracheids
  • companion cells
  • sieve areas
  • phloem parenchyma
Stem develops from
  • radicle
  • cotyledon
  • mesocarp
  • plumule
Stem grows in girth due to
  • outer cortical
  • epidermis
  • vascular cambium
  • phellogen
Which of the following is true about heartwood?
  • They are dead but gives mechanical support to stem.
  • They are light in color.
  • They conduct water and minerals.
  • 1 and 3
Pith is very well developed in
  • monocot root and monocot srem
  • monocot root and dicot root
  • dicot root and monocot stem
  • monocot root and dicot stem
Which of the following helps in the curling of the leaf surface?
  • Bulliform cells
  • Xylem tissue
  • Palisade parenchyma
  • Bundle sheath cells
Walls of sclerenchyma are
  • rigid
  • lignified
  • pectinised
  • suberised
After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located
  • just outside the vascular cambium
  • just inside the vascular cambium
  • just inside the vascular phloem
  • just outside the secondary xylem
The innermost layer of cortex which shows casparian thickenings in its cells is called as
  • epidermis
  • endodermis
  • pericycle
  • exodermis
Vessels differ from tracheids
  • in being living
  • in being derived from a single cell
  • in that they consist of vertical row of cells with cross walls dissolved
  • in coducting water and minerals
Endodermis cells are rich in
  • cellulose
  • starch grains
  • fibers
  • resins and wax
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