Section A + B

• Pathogens

  • Fungi - Athlete's foot
  • Bacteria - Tuberculosis
  • Viruses - Influenza
  • Plants - Rusts
  • Daisy Drover 4G 2023
• Stem cells


  Great potential for cures, but body may reject
• Muscle fibres


  Change shape
• Cell types


  • Xylem (hollow)
  • Animal (forked)
  • Hair root
  • Red blood cell
  • Plant (more complex)
• Kingdoms of life


  • Plant - multicellular
  • Animal - multicellular
  • Fungi - unicellular
  • Protoctista - unicellular
  • Viruses
• Tobacco mosaic virus was discovered in plants
• Animal viruses have a protein coat
• Cell components


  • Nucleus
  • Cytoplasm
  • Cell surface membrane
• Nucleus


  • Largest cell organelle, contains chromosomes with genes
• Cytoplasm


  • Jelly-like substance where chemical reactions take place
• Cell surface membrane


  • Controls entry and exit of molecules
• Mitochondria


  • Where aerobic respiration takes place
• Cell wall


  • Supports the plant cell
• Chloroplast


  • Absorbs light for photosynthesis
• Ribosome


  • Where protein synthesis takes place
• Vacuole


  • Contains cell sap, helps maintain plant cell pressure