10th Class Science Sample Paper Sample Paper - 4 Term - 1

  • question_answer
      How does transpiration help in the functioning of plant? A plant leaf was coated with Vaseline. What happens to

    Answer:

      Transpiration is important in plant because (i) It helps in ascent of sap through xylem. (ii) It helps in removal of excessive water. (iii) It helps in temperature regulation of plant.                                                                                                                  (1) Leaf does not remain healthy when coated with vaseline, because vaseline coat does not allow gaseous exchange and transpiration from leaf surface.                                                                                                                        (2)


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