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STD 11 - 5. Morphology flowering plants — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 5. Morphology flowering plants1 Mark
MCQ
Phyllode is present in
  • A
    Asparagus
  • B
    Euphorbia
  • ✓
    Australian Acacia
  • D
    Opuntia.
✓

Answer

Correct option: C.
Australian Acacia
c
(c) : In several species of Acacia found in the deserts of Australia the bipinnate lamina is absent. Instead petiole and part of the rachis become flattened into sickle­shaped structure for performing the function of food synthesis. Such a flattened petiole which carries out the functions of the lamina is called phyllode. Formation of phyllode is a mechanism to reduce transpiration because $(i)$ it is vertically placed and $(ii)$ has fewer stomata.

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