CBSE  /  Class 11  /  Biology  /  Structural Organisation in Animals

  • 1. 
    Quiescent centre is present in the

  • apical meristem
  • shoot meristem
  • lateral meristem
  • root meristem

  • 2. 
    Closed vascular bundles lacks

  • pith
  • xylem
  • cambium
  • xylem vessels

  • 3. 
    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.

  • 4. 
    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

  • 5. 
    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

  • 6. 
    Fusifrom initial cells of cambium from

  • vascular rays
  • tracheary elements
  • ray parenchyma
  • phloem parenchyma

  • 7. 
    Callose deposition is found in

  • tracheids
  • companion cells
  • sieve areas
  • phloem parenchyma

  • 8. 
    Stem develops from

  • radicle
  • cotyledon
  • mesocarp
  • plumule

  • 9. 
    Stem grows in girth due to

  • outer cortical
  • epidermis
  • vascular cambium
  • phellogen

  • 10. 
    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
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