Science Activity 7.2 of Class 10 Science CBSE

In this post, we will discuss science activity 7.2 of class 10 science CBSE from chapter 7 Control and Coordination of NCERT Book. You can also go through science activity 7.3 of class 10 science CBSE which is also very useful for your upcoming board exam.

Science Activity 7.2 of Class 10 Science CBSE

In this science activity 7.2 of class 10 science CBSE we are going to learn about the Phototrophic movement of plants.

NCERT Science Class 10 Chapter 7  Control and  Coordination Activity solution

Activity – 7.2

 

Object: - Response of the plant to the direction of light

 Material Required: A cardboard open from one side, conical flask, water, wire- mesh, freshly germinated seeds.

 Procedure: Fill the conical flask with water. Now cover the neck (mouth) of the flask with wire -mesh. Keep a few freshly germinated seeds on wire mesh.

 Keep this flask in a cardboard box in such a manner that the open side of the box faces light coming from the ‘window’. Observe after 3 days.

phototrophic movement of plants 

 Observation: Shoots of the seedlings bend towards light and roots bend away from the light. Now the flask is turned so that the shoots are away from light and roots, are towards the light. If this setup is observed after a couple of days then we will find that the roots and shoots again change their direction of growth.

 Inference: It can be inferred that shoots always grow (move) towards the light. They are positively phototrophic, while roots grow away from the light. Roots are negatively phototrophic. 

So now you can understand  Science Activity 7.2 of Class 10 Science CBSE for the better practice you can also read NCERT solutions of class 10 Science Chapter 7 Control and Coordination.

Related Searches

1. Previous activity - Activity 7.1

2. Next activity - Activity 7.3

3. Solutions of Chapter 7 Control and  coordination

4. Extra Questions of Chapter 7