Cell: The smallest structural and functional unit of life. It forms the basic building block of all living organisms, enabling them to perform essential life processes.
Structural unit: All living organisms are made up of cells. This means that the fundamental architecture of any organism is composed of one or more cells.
Functional unit: The cell is the smallest structure capable of performing basic life processes. It carries out functions necessary for survival, such as growth, reproduction, and response to the environment.
Cell theory: All organisms are made up of cells, and all cells arise only from pre-existing cells. This principle emphasizes the continuity of life through cell division and reproduction.
1. How does the role of a cell as a structural unit differ from its role as a functional unit?
2. Which scientist is credited with discovering dead cells in a cork slice in 1665?
3. What is the primary role of the cell wall in plant cells?
Cell — basic unit of life?
Smallest structural and functional unit.
Cell discovery — first scientist?
Robert Hooke in 1665.
Nucleus — role?
Controls cell activities and stores DNA.
Plasma membrane — property?
Selective permeability and flexibility.
Diffusion — mechanism?
Molecules move from high to low concentration.
Osmosis — process?
Water moves through semi-permeable membrane.
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