NCERT Class 9 Science Chapter 2 Cell: The Building Block of Life Solutions
NCERT Class 9 Science Chapter 2 Cell: The Building Block of Life Solutions Think It Over (Page No. 8) 1. Where does a cell come from? Answers: A cell comes from a pre-existing cell. According to cell theory, new cells are formed by the process of cell division from already existing cells. 2. How have technological interventions facilitated the creation of new knowledge in understanding the world beyond the naked eye? Answers: Technological tools like microscopes have helped scientists study cells which are too small to be seen by the naked eye. Early scientists like Robert Hooke observed cells using a microscope. Modern light microscopes provide better magnification and clarity. Electron microscopes allow scientists to see very tiny structures at the nanometre level with great detail. These advancements have greatly improved our understanding of cell structure and function. 3. How is the cell structural and functional unit of life? Answers: All living organisms are made up of cells. ...