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Why do eukaryotic cells need these organelles?
Eukaryotic cells contain many organelles to perform different life processes efficiently. Each organelle has a specific role, such as mitochondria producing energy, ribosomes making proteins and lysosomes removing waste. This division of labour allows multiple processes to occur simultaneously, makiRead more
Eukaryotic cells contain many organelles to perform different life processes efficiently. Each organelle has a specific role, such as mitochondria producing energy, ribosomes making proteins and lysosomes removing waste. This division of labour allows multiple processes to occur simultaneously, making the cell more efficient organised and capable of supporting complex life functions.
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 lessThe 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 less