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Crescograph is an instrument to record

  • A.The age of star
  • B.Age of earth
  • C.Plant growth
  • D.None of these

Answer: C

The crescograph records plant growth.

Jagadish Chandra Bose invented it about 1900. It magnified movement up to ten thousand times, letting him show that plants respond to light, heat and touch, and that their growth proceeds in tiny pulses.

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