Section 1: Nature and Variety of Living Organisms

Biology Revision

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B) Variety of Living Organisms


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B) Variety of Living Organisms


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  • Multicelluar
  • No cell walls and no chlorophyll - so no p/s
  • Heterotrophic- other feeding
  • Carbohydrate store is Glycogen
  • Nervous system
  • Locomotion
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  • Microscopic
  • Reproduce by Binary Fission
  • Useful and harmful
  • Pathogenic
  • Autrophic and Photosynethsis- bacteria chlorophyll
  • Saprotrophic
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  • Sub Microscopic- need electron microscope to see them
  • parasitic- get into a living cell
  • Only reproduce
  • Infect all types of living things e.g. plants,animals, bacteria and dinosaurs
  • Genetic material is DNA in some and RNA in others. E.g. RNA is HIV and DNA is flu
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  • Single celled- all life process happen
  • Microscopic and have animal and plant characteristics
  • Pathogenic (E.g. Plasmodium which causes malaria when transmitted by mosquitoes)
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  • Heterotrophic
  • Chitin cell wall
  • Single celled e.g. yeast / made out of hypae interwcave to make mycellum e.g. moulds
  • Glycogen is carbohydrate store
  • Pathogenic - causes diseases (e.g. atheltes food, the fungus causes the irish potatoe famine
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