CBSE Class 9 Science Notes Chapter 5 The Fundamental Unit Of Life:
CBSE Class 9 Science Notes Chapter 5 The Fundamental Unit Of Life: NOTES Chapter 5: The Fundamental Unit Of Life Introduction: Cells are the basic structural and functional units of life. All living organisms are made up of one or more cells. The cell theory, proposed by Schleiden and Schwann, states that all living organisms are composed of cells, and new cells arise from pre-existing cells. The cell is the fundamental unit of life. Cell : A cell is a microscopic, membrane-bound structure that contains cytoplasm, genetic material, and organelles. Cells can be classified into two types: prokaryotic and eukaryotic. Prokaryotic cells are primitive cells that lack a nucleus and membrane-bound organelles, whereas eukaryotic cells have a well-defined nucleus and organelles. Cell Organelles : Organelles are specialized structures within cells that carry out specific functions. Some of the important organelles are: • Nucleus : It is a spherical, membrane-bound organelle that ...
