biology a

• Movement


  An action by an organism causing a change of position or place
• Respiration


  The chemical reactions in cells that break down nutrient molecules and release energy
• Sensitivity


  The ability to detect and respond to changes (stimuli) in the environment
• Control


  The ability to keep conditions in the body within narrow limits
• Growth


  Getting bigger using cell division
• Reproduction


  Making more organisms
• Excretion


  Removing metabolic waste
• Nutrition


  Feeding – obtaining food or photosynthesising
• Five kingdoms of living organisms

  • Animals
  • Plants
  • Fungi
  • Protoctists
  • Bacteria
• Animals


  • Humans, mosquito, house fly
• Plants


  • Beans, peas, maize
• Fungi


  • Yeast, Mucor, mushroom
• Protoctists


  • Amoeba, Chlorella, Plasmodium
• Bacteria


  • Lactobacillus bulgaricus, Pneumococcus, Escherichia coli
• Plant cells

  • Have chloroplasts
  • Have a cell wall
  • Have a permanent vacuole
• Animal cells

  • Do not have chloroplasts
  • Do not have a cell wall
  • Do not have a permanent vacuole
• Prokaryotes


  Cells without a proper nucleus
• Eukaryotes

  Cells with a proper nucleus
• Viruses are not considered living organisms as they do not carry out all the life processes
• Viruses are smaller than bacteria
• Viruses do not have a cell wall, cell membrane or cytoplasm
• Viruses do not have a slime layer
• Viruses have a protein coat, bacteria do not
• Viruses do not carry out any of the life processes (respiration, excretion, movement)
• Viruses can only reproduce inside living organisms