cells

• cell theory

  • all organisms are made up of cells
  • all cells come from existing cells
  • cells are the basic units of life
• all cells have

  • cytoplasm
  • DNA
  • ribosomes
  • outer plasma membrane
• unicellular organisms are single cell organisms e.g. bacteria, amoeba
• multicellular organisms are organisms made up of many cells e.g. human
• there are two types of cells

  prokaryotes and eukaryotes
• prokaryotes

  • unicellular
  • simple cell structure
  • no membrane-bound organelles
  • no nucleus
  • DNA found in a single (spaghetti like), circular DNA chromosome
• eukaryotes

  • larger + more complex
  • have membrane-bound organelles
  • multicellular
  • has nucleus
• the purpose of a flagella is movement