9th Class Science Improvement in food resources Question Bank 9th CBSE Science Improvement in food resources

  • question_answer
      Write the modes by which insects affect the crop yield.          

    Answer:

                      Insects affect the crop yield in three ways (i) They cut the root, stem and leaves. (ii) They suck the cell sap. (iii) They bore into stem and root.      (2)       


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