CBSE Class 9 Science – The Fundamental Unit of Life
Chapter Overview
This chapter introduces the cell as the basic structural and functional unit of life. It explains cell theory, types of cells, cell organelles, and their functions. The chapter also discusses essential processes like osmosis, diffusion, and cell division.
Important Keywords
Cell: The basic unit of life.
Cell Membrane: The outer covering of a cell that controls movement of substances.
Cytoplasm: The fluid inside a cell where organelles are present.
Nucleus: The control center of the cell containing genetic material.
Mitochondria: The powerhouse of the cell that produces energy.
Ribosomes: Organelles responsible for protein synthesis.
Endoplasmic Reticulum (ER): Helps in transportation of substances.
Osmosis: Movement of water molecules through a semipermeable membrane.
Diffusion: The movement of molecules from a higher to a lower concentration.
Cell Division: The process by which cells reproduce.
Detailed Notes
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Important Facts
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Comparison Table
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Quick Revision
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Real Life Connection
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Frequently Asked Questions (FAQs)
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Learning Objectives
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