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Secondary growth in dicots and gymnosper...

Secondary growth in dicots and gymnosperms occurs by

A

Formation of vascular rays

B

Thickening of tracheary elements

C

Formation of meristematic cells in vascular region

D

Development of meristematic cells in vascular & cortical regions

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The correct Answer is:
D
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ALLEN-STRUCTURAL ORGANISATION IN PLANTS (MOPRHOLOGY OF FLOWERING PLANTS & ANATOMY OF FLOWERING PLANTS)-Exercise-I (Primary Internal Structure to Secondary Growth)
  1. Which of the following is a meristematic tissue

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  2. sea shore trees do not show annual rings because

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  3. Secondary growth in dicots and gymnosperms occurs by

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  4. the balloon- like growths of parenchyma the lumen of a vessel are know...

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  5. Which of the following tissues originate from ray initials of cambium

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  6. Cork is an execellent material for making bottle stopper because it is

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  7. In monocot stems, secondary growth cannot occur because vascular bundl...

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  8. Gymnosperm wood is non-porous because it (a) lacks vessels (b) cont...

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  9. porous wood is characterised by

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  10. Outer layer of bark is (a) epidermis (b) rhytidome (c) phelloderm...

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  11. secondary growth is the production of

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  12. each annual ring or growth ring consists of two strips of

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  13. The intarfascicular cambium is situated

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  14. In which of the following monocots secondary growth is present ?

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  15. Vascular tissue having abundant vessels and fibres is

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  16. amount of secondary xylem as compared to secondary pholem formed eve...

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  17. Monocot root differs from dicot root in having

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  18. Which one increases due to cambium:

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  19. Autumn wood is distinguishable from spring wood in having

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  20. Palisade parenchyma is present on both sides in

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