Cell Biology: Plant vs Animal Cell & Photosynthesis (WAEC Standard) 🔬

SSS 1 - 3

Cell Ultrastructure and Biochemical Energetics•Module 1 • Lesson 1•Est. 25 mins

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Section 1 of 3

The Living Cell: Foundation of All Organisms

### Cell Theory Principles (Hooke, Schleiden & Schwann): 1. All living organisms are composed of one or more cells. 2. The cell is the basic structural and functional unit of life. 3. All cells arise from pre-existing cells by cell division. #### Plant Cell vs Animal Cell (Key WAEC Distinctions): * **Cell Wall**: Present in plant cells (composed of rigid cellulose); absent in animal cells. * **Chloroplasts**: Present in plant cells containing chlorophyll for photosynthesis; absent in animal cells. * **Vacuole**: Plants have a large, permanent central vacuole filled with cell sap; animals possess small, transient vacuoles. * **Centrioles**: Present in animal cells for spindle fiber formation; generally absent in higher plant cells.

Core Takeaway: Cellulose cell wall and chloroplasts are exclusive to plant cells in WAEC examinations.

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