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Cell Theory — The Unifying Principle of Biology. Explain.
In 1838, a German botanist named Matthias Schleiden stated that all plants are made up of cells. Later, Theodor Schwann concluded that animals are also made of cells. Rudolf Virchow added that new cells arise from pre-existing cells. Together, these ideas formed the Cell Theory, which explains thatRead more
In 1838, a German botanist named Matthias Schleiden stated that all plants are made up of cells. Later, Theodor Schwann concluded that animals are also made of cells. Rudolf Virchow added that new cells arise from pre-existing cells. Together, these ideas formed the Cell Theory, which explains that cells are the basic structural and functional units of life.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See lessCell is The Building Block of Life. Explain.
A cell is the building block of life because it is the smallest unit capable of performing all vital functions. All organisms, whether unicellular or multicellular, are made of cells. Cells combine to form tissues, tissues form organs and organs form systems. Even in complex organisms, cells remainRead more
A cell is the building block of life because it is the smallest unit capable of performing all vital functions. All organisms, whether unicellular or multicellular, are made of cells. Cells combine to form tissues, tissues form organs and organs form systems. Even in complex organisms, cells remain the basic structural and functional unit of life.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See lessHow to Study Cells?
Cells are studied using microscopes, as they are smaller than the resolution limit of the human eye. Light microscopes provide basic magnification, while electron microscopes reveal detailed internal structures. Scientists prepare slides, stain cells and observe them under microscopes. These tools hRead more
Cells are studied using microscopes, as they are smaller than the resolution limit of the human eye. Light microscopes provide basic magnification, while electron microscopes reveal detailed internal structures. Scientists prepare slides, stain cells and observe them under microscopes. These tools help in understanding cell size, structure organelles and their functions effectively.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See lessWhat if mung bean seeds are kept in a concentrated solution after soaking in water for 12 hours? What will happen to them?
When soaked mung bean seeds are placed in a concentrated solution, water moves out of the cells due to osmosis. The surrounding solution has higher solute concentration, causing water loss from seeds. This leads to shrinking of cells and reduction in size. The seeds become flaccid and lose their swoRead more
When soaked mung bean seeds are placed in a concentrated solution, water moves out of the cells due to osmosis. The surrounding solution has higher solute concentration, causing water loss from seeds. This leads to shrinking of cells and reduction in size. The seeds become flaccid and lose their swollen condition due to water loss.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See lessAll living organisms are made up of cells. Explain.
According to cell theory, all living organisms are made up of one or more cells. Unicellular organisms perform all life functions within a single cell, while multicellular organisms have many specialised cells. These cells organise into tissues organs and systems. Thus, cells are the fundamental uniRead more
According to cell theory, all living organisms are made up of one or more cells. Unicellular organisms perform all life functions within a single cell, while multicellular organisms have many specialised cells. These cells organise into tissues organs and systems. Thus, cells are the fundamental units that make up every living organism, from bacteria to humans.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See less