Activity 5.7 Class9 Science The Fundamental Unit of Life

 Activity 5.7 Class9 Science The Fundamental Unit of Life

Activity 5.7 Class 9 Science belongs to Chapter 5 The Fundamental Unit of Life Class 9 Science. You will get a complete solution with an explanation and conclusion. After reading activity 5.7, you will be able to answer the questions based on the activity.

Activity 5.7 Class 9 Science Chapter 5

 

You are suggested to study NCERT activity 5.6 class 9 science chapter 5 explanation with a conclusion so that you can attempt questions based on activity 5.6 class 9 science.

 

Activity 5.7 Class 9 Science

    ·     Let us take a glass slide with a drop of water on it. Using an ice cream spoon gently scrape the inside surface of the cheek. Does any material get stuck on  the spoon? With the help of a needle, we can transfer this material and spread it evenly on the glass slide kept ready for this. To colour the material we can put a drop of methylene blue solution on it. Now the material is ready for observation under a microscope. Do not forget to put a cover slip on it.

    ·     What do we observe? What is the shape of the cell we see? Draw it on the observation sheet.

     ·     Was there a darkly coloured spherical or oval dot-like structure near the centre of each cell? This structure is called a nucleus. Were there similar structures in onion peel cells?

 

Observation & Explanation Activity 5.7 Class 9 Science

We observe a number of polygonal flat squamous cells in the scraped membrane. We notice coloured spherical or oval dot-like structures near the centre. These are nuclei.

We can see similar structures in onion peel cells.

In animal cells, the nucleus lies at the centre of the cells but in plant cells, it lies at the side of the cell. 

Conclusion Activity 5.7 Class 9 Science

Animal cells and plant cells contain nuclei. 

  Related Topics

1.  Activity 5.1 Class 9 Science

2.  Activity 5.6 Class 9 Science