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Morphology of Flowering Plants — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYMorphology of Flowering Plants2 Marks
Question
Give one basic difference between the following:
  1. Reticulate venation and parallel venation.
  2. Thorn and spine.
✓

Answer

  1.  
S. No
Reticulate Venation
Parallel Venation
(i)
When the midrib and its branches make a network (reticulum) on the lamina, it is called reticulate venation.
When the veins on the lamina run parallel to one another, it is called parallel venation.
(ii)
It is characteristically found in dicot plants.
It is characteristically found in monocot plants.
  1.  
  • Thorn is a stem modified into a woody, straight and pointed structure.
  • Spine is a leaf modification in arid plants to reduce water loss and protection of plants from browsing animals.

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