Chapter 2 Uniformity and diversity of the cell Learning obiectives 1. Look briefly at the history of cell theory 2. Consider the basic properties of cells 3. Compare some characteristics of two different classes of cells prokaryotes and eukaryote 4. Comprehend a special life: viruses
Chapter 2 Uniformity and Diversity of the cell Learning Objectives 1. Look briefly at the history of cell theory; 2. Consider the basic properties of cells; 3. Compare some characteristics of two different classes of cells: prokaryotes and eukaryotes; 4. Comprehend a special life: viruses
1. The Cell Theory: A Brief history The discovery of cells followed from the invention of the microscope In 1665. Robert Hooke saw a network of tiny boxlike compartments that reminded him of a honeycomb. Then He called these little compartments cellulae", a Latin term meaning little room. It is from this word we get our present-day term, cell. The microscope used by Robert Hooke and the honeycomb-like network of' cell he drawed in 1665
1. The Cell Theory: A Brief History In 1665, Robert Hooke saw a network of tiny boxlike compartments that reminded him of a honeycomb. Then He called these little compartments" cellulae", a Latin term meaning little room. It is from this word we get our present-day term, cell. The microscope used by Robert Hooke and the honeycomb- like network of" cell" he drawed in 1665 The discovery of cells followed from the invention of the microscope
Cell theory has three basic tenets 1. All organisms are composed of one or more cells 2. The cell is basic unit of structure and function for all organIsms. 3. All cells arise only 区19, Schleiden(1804~1834) M 20. Schwann (1510-1s from preexisting cells by division
Cell theory has three basic tenets: 1. All organisms are composed of one or more cells. 2.The cell is basic unit of structure and function for all organisms. 3.All cells arise only from preexisting cells by division
2. Why are cells the basic units of life? A. The cell is the structural unit of life All organisms is make up of cells. Red blood testinal epithehal cells
2. Why are cells the basic units of life? A. The cell is the structural unit of life, All organisms is make up of cells
BThe cell is the functional unit of organisms All meta bolic activity is based on cells
B.The cell is the functional unit of organisms. All metabolic activity is based on cells