The cell interior is a coordinated system where different organelles work together inside the cytoplasm. The nucleus controls activities, mitochondria produce energy and other organelles perform specialised tasks. This coordination allows the cell to function like a small factory, carrying out lifeRead more
The cell interior is a coordinated system where different organelles work together inside the cytoplasm. The nucleus controls activities, mitochondria produce energy and other organelles perform specialised tasks. This coordination allows the cell to function like a small factory, carrying out life processes efficiently and maintaining balance within the cell and the organism.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
The cell wall is a tough outer covering found in plant cells, made mainly of cellulose. It provides structural support, protection and maintains the shape of the cell. It helps plants stand upright and resist environmental stress. Although rigid, it is permeable, allowing water and some substances tRead more
The cell wall is a tough outer covering found in plant cells, made mainly of cellulose. It provides structural support, protection and maintains the shape of the cell. It helps plants stand upright and resist environmental stress. Although rigid, it is permeable, allowing water and some substances to pass through while supporting the cell.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
The cell membrane is a thin, flexible boundary present in all cells. It protects the cell and controls the movement of substances in and out. Being selectively permeable, it allows useful substances like nutrients and gases to pass while blocking harmful ones. It also helps cells communicate and intRead more
The cell membrane is a thin, flexible boundary present in all cells. It protects the cell and controls the movement of substances in and out. Being selectively permeable, it allows useful substances like nutrients and gases to pass while blocking harmful ones. It also helps cells communicate and interact with their surroundings.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
Yes, mature red blood cells (RBCs) in humans do not have a nucleus. This allows more space for haemoglobin, increasing oxygen-carrying capacity. Some specialised cells may also lack a nucleus or lose it during development to perform specific functions more efficiently, although most cells generallyRead more
Yes, mature red blood cells (RBCs) in humans do not have a nucleus. This allows more space for haemoglobin, increasing oxygen-carrying capacity. Some specialised cells may also lack a nucleus or lose it during development to perform specific functions more efficiently, although most cells generally contain a nucleus for controlling activities.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
Cells prevent waste accumulation using lysosomes, which contain digestive enzymes. These enzymes break down waste materials, old organelles and harmful substances into simpler components. The breakdown products can be reused by the cell. This cleaning process maintains cell health and prevents harmfRead more
Cells prevent waste accumulation using lysosomes, which contain digestive enzymes. These enzymes break down waste materials, old organelles and harmful substances into simpler components. The breakdown products can be reused by the cell. This cleaning process maintains cell health and prevents harmful buildup, ensuring proper functioning of the cell.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
The Cell Interior — A Coordinated Working System. Explain.
The cell interior is a coordinated system where different organelles work together inside the cytoplasm. The nucleus controls activities, mitochondria produce energy and other organelles perform specialised tasks. This coordination allows the cell to function like a small factory, carrying out lifeRead more
The cell interior is a coordinated system where different organelles work together inside the cytoplasm. The nucleus controls activities, mitochondria produce energy and other organelles perform specialised tasks. This coordination allows the cell to function like a small factory, carrying out life processes efficiently and maintaining balance within the cell and the organism.
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 wall — The outer covering of cells. Explain.
The cell wall is a tough outer covering found in plant cells, made mainly of cellulose. It provides structural support, protection and maintains the shape of the cell. It helps plants stand upright and resist environmental stress. Although rigid, it is permeable, allowing water and some substances tRead more
The cell wall is a tough outer covering found in plant cells, made mainly of cellulose. It provides structural support, protection and maintains the shape of the cell. It helps plants stand upright and resist environmental stress. Although rigid, it is permeable, allowing water and some substances to pass through while supporting the cell.
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 membrane — The universal feature of a cell. Explain.
The cell membrane is a thin, flexible boundary present in all cells. It protects the cell and controls the movement of substances in and out. Being selectively permeable, it allows useful substances like nutrients and gases to pass while blocking harmful ones. It also helps cells communicate and intRead more
The cell membrane is a thin, flexible boundary present in all cells. It protects the cell and controls the movement of substances in and out. Being selectively permeable, it allows useful substances like nutrients and gases to pass while blocking harmful ones. It also helps cells communicate and interact with their surroundings.
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 lessDo you know any other cells without nucleus?
Yes, mature red blood cells (RBCs) in humans do not have a nucleus. This allows more space for haemoglobin, increasing oxygen-carrying capacity. Some specialised cells may also lack a nucleus or lose it during development to perform specific functions more efficiently, although most cells generallyRead more
Yes, mature red blood cells (RBCs) in humans do not have a nucleus. This allows more space for haemoglobin, increasing oxygen-carrying capacity. Some specialised cells may also lack a nucleus or lose it during development to perform specific functions more efficiently, although most cells generally contain a nucleus for controlling activities.
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 does the cell prevent these wastes from accumulating inside it?
Cells prevent waste accumulation using lysosomes, which contain digestive enzymes. These enzymes break down waste materials, old organelles and harmful substances into simpler components. The breakdown products can be reused by the cell. This cleaning process maintains cell health and prevents harmfRead more
Cells prevent waste accumulation using lysosomes, which contain digestive enzymes. These enzymes break down waste materials, old organelles and harmful substances into simpler components. The breakdown products can be reused by the cell. This cleaning process maintains cell health and prevents harmful buildup, ensuring proper functioning of the cell.
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