Basic units of life

• Macroscopic view


  Organs, structures of plants or animals that are large and visible to the naked eye
• Cell theory


  Scientists' ideas of the existence of cells
• Types of electron microscopes

  • SEM: Scanning electron microscope - used to scan and view the surface of objects
  • TEM: Transmission electron microscope - used to see inside objects by transmitting light through them
• Cell components


  • Protein
  • Carbohydrates
  • Lipids
  • Nucleic acids
  • Water
• Cell wall


  Encloses the cell<|>Forms outer protective layer of plant cells<|>Gives cell a definite shape
• Protoplasm


  The living material or substance in plant and animal cells
• Income and expenditure statements