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The Cell
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This document contains information about cells, cell size,cell theory. Then it also talks about microscopes and life functions
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Topic 1.1CELL THEORY
,Topic Outline AUDIO
Functions of Life
Cell Theory
Microscopes
Magnification
Surface Area : Volume Ratio
Multicellular Organisation
Cell Differentiation
Stem Cells
The evolution of multicellular organisms allowed cell specialisation and cell replacement
, Functions of Life
All living things carry out 7 basic life functions:
• Metabolism (undertakes essential chemical reactions)
• Reproduction (produces offspring – sexually or asexually)
• Sensitivity (responsive to internal and external stimuli)
• Homeostasis (maintains a stable internal environment)
• Excretion (able to remove toxic waste products)
• Nutrition (exchanges material with the environment)
• Growth / movement (changes shape / size / position) Mnemonic: MR SHENG
Organisms consisting of only one cell carry out all the functions of life
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