What are Plant Hormones, How is the Movement of Leaves of the Sen in Text Question Chapter 7 Control and Co-ordination

In text questions of page no. 122 Chapter 7: Control and Co-ordination Science Class 10 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. What are plant hormones, How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light, Give an example of a plant hormone that promotes growth, How do auxins promote the growth of a tendril around a support is solved by our expert teachers. You can get ncert solutions and notes for class 10 chapter 7 absolutely free. NCERT Solutions for class 10 Science Chapter 7: Control and Co-ordination is very essencial for getting good marks in CBSE Board examinations

In text questions of page no. 122

Q. No. 1: What are plant hormones?
Ans: Plant hormones are the fluids which are secreted within the plant also known as phytohormones. Plant hormones regulate the growth and development of the plant. Examples of plant hormones are auxin, gibberellins etc.

Q. No. 2: How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
Ans: The movements of the leaves of the sensitive plant are touch sensitive and independent of growth. While the movement of the shoot towards light is growth related and known as phototropism.

Q. No. 3: Give an example of a plant hormone that promotes growth.
Ans: Gibberellin is an example of plant hormone which promotes the growth of the plant.

Q. No. 4: How do auxins promote the growth of a tendril around a support?
Ans: Auxin is plant hormone which is synthesized at the tip of the shoot. It helps the cell grow longer. When a tendril comes in contact with a support, auxin stimulates faster growth of the cells on the opposite side that’s why the tendril forms a coil around the support.

Q. No. 5: Design an experiment to demonstrate hydrotropism.
Ans: Take a cubical transparent glass container and fill it with water. Now put some geminating seeds in it. After one or two days you will observe that the roots of all the geminating seeds will grow towards the water. This experiment proves that roots of germinating seed show the character of positive geotropism.