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10th Class Science Control and Coordination Question Bank 10th CBSE Science Control and Coordination

  • question_answer
      What are plant hormones? [NCERT, CBSE (AI) 2008C] Why are roots called positively geotropic?

    Answer:

                      In plants, certain chemical substances are necessary for proper growth and development. These chemical substances are called plant hormones or phytohormones.


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