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STD 11 - 13. Plant growth and development — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 13. Plant growth and development1 Mark
MCQ
By arc auxanometer, we measure the growth in
  • ✓
    Elongation
  • B
    Thickness
  • C
    Both $ (a) $ and $(b)$ 
  • D
    None of the above
✓

Answer

Correct option: A.
Elongation
a
(a)In arc auxanometer actual growth in length of a plant is measured as actual growth
=$\frac{{{\rm{distance}}\,{\rm{travelled}}\,{\rm{by}}\,{\rm{pointer}}\, \times \,{\rm{radius}}\,{\rm{of}}\,{\rm{pulley}}}}{{{\rm{Length}}\,{\rm{of}}\,{\rm{pointer}}\,{\rm{from}}\,{\rm{centre}}\,{\rm{of}}\,{\rm{pulley}}}}$

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