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Class 10 CH- 7 control and coordination HOTS QUESTIONS
MCQs (multiple choice questions) Q. Which of the following is not a plant hormone ? a. Auxin b. Ascorbic acid c. Cytokinin d. Abscisic acid Ans. (b) ascorbic acid. Q. The plant part which exhibit -ve geotropism is: a. Root b. Stem c. Branch d. Leaves Ans. (B) STEM Q. The movement of sunflower in accordance with the path of the sun is due to : a. photonasty b. Hydrotropism c. Phototropism d. Chemotropism Ans. C -phototropism. Q. The plant hormone which triggers the fall of mature leaves and fruits from the plant body is : a. Auxin b. Gibberellin c. Abscisic acid d. Cytokinin Ans c- abscisic acid. Q. Which of the following acts as a stimulus in the process of hydrotropism ? a. Hydrocarbon. b. Hydrogen oxide c. HCL d. Hydrogen peroxide. . . . . . . Ans. B - hydrogen oxide . . . . . . . . ...
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