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How is the cell structural and functional unit of life?
The cell is the structural unit as all organisms are made of cells that form tissues and organs. It is the functional unit because all vital processes such as respiration, nutrition, excretion and growth occur within cells. Each cell performs necessary life functions independently or in coordinationRead more
The cell is the structural unit as all organisms are made of cells that form tissues and organs. It is the functional unit because all vital processes such as respiration, nutrition, excretion and growth occur within cells. Each cell performs necessary life functions independently or in coordination, making it essential for survival and functioning of living organisms.
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 lessWhere does a cell come from?
Cells originate from pre-existing cells through a process called cell division. This idea was proposed by Rudolf Virchow and is part of cell theory. During division, a parent cell divides to form new daughter cells. This process helps in growth, tissue repair and reproduction. No new cell is formedRead more
Cells originate from pre-existing cells through a process called cell division. This idea was proposed by Rudolf Virchow and is part of cell theory. During division, a parent cell divides to form new daughter cells. This process helps in growth, tissue repair and reproduction. No new cell is formed spontaneously; every cell has a cellular origin.
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 argument would you give for the necessity of a cell wall in plants usually fixed in one place versus in animals usually moving from one place to the other?
Plants are fixed in one place and face environmental stresses like wind and pressure, so they need a rigid cell wall for support and protection. The cell wall maintains shape and prevents damage. Animals, however, move and require flexible cells for movement and changing shape. Therefore, animal celRead more
Plants are fixed in one place and face environmental stresses like wind and pressure, so they need a rigid cell wall for support and protection. The cell wall maintains shape and prevents damage. Animals, however, move and require flexible cells for movement and changing shape. Therefore, animal cells lack a cell wall and only have a cell membrane.
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 consequences would you predict for a plant cell if its cell wall were to become as flexible as a cell membrane?
If the plant cell wall becomes as flexible as the cell membrane, the cell would lose its rigidity and fixed shape. It would not be able to withstand external pressure or maintain structure. The plant would become weak and unable to stand upright. The protective and supportive functions of the cell wRead more
If the plant cell wall becomes as flexible as the cell membrane, the cell would lose its rigidity and fixed shape. It would not be able to withstand external pressure or maintain structure. The plant would become weak and unable to stand upright. The protective and supportive functions of the cell wall would be lost, affecting the plant’s survival.
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 lessWhy is it important to cut the two potato pieces in roughly equal size and measure their initial weight before placing them in different liquids?
Using potato pieces of equal size and measuring their initial weight ensures that any observed change is due to the solution and not differences in size or mass. This makes the experiment reliable and accurate. It helps compare results properly and clearly shows the effect of osmosis on the potato pRead more
Using potato pieces of equal size and measuring their initial weight ensures that any observed change is due to the solution and not differences in size or mass. This makes the experiment reliable and accurate. It helps compare results properly and clearly shows the effect of osmosis on the potato pieces placed in different solutions.
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