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Cambridge IGCSE Biology Extended Level PowerPoint Presentation
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Cambridge IGCSE Biology Extended Level

Cambridge IGCSE Biology Extended Level

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Cambridge IGCSE Biology Extended Level

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  1. ClickBiology Cambridge IGCSE BiologyExtended Level Classification Plants, Bacteria, Viruses and Fungi

  2. You should be able to: • List the main visible features of monocotyledonous and dicotyledonous flowering plants. • List the main features of viruses, bacteria and fungi, and their adaptations to the environment

  3. Flowering plants are classified into two groups: Monocotyledonous plants1 cotyledon strap like leavesparallel veinsflower parts divisible by 3example: kaffir lily

  4. Flowering plants are classified into two groups: Dicotyledonous plants2 cotyledonsbroad leavesbranching veinsflower parts divisible by 4 or 5

  5. Comparing monocotyledons and dicotyledons:

  6. Which plant is a monocotyledon and which is a dicotyledon? dicotyledon monocotyledon

  7. You should be able to: • List the main visible features of monocotyledonous and dicotyledonous flowering plants. • List the main features of viruses, bacteria and fungi, and their adaptations to the environment

  8. Bacteria are single celled organisms • Bacteria cells are about 1/1000th the size of animal or plant cells. cell membrane cytoplasm DNA no nucleus, DNA is one long strand kept in the cytoplasm cell wall made of peptidoglycans slime capsule

  9. Viruses are not classified as living things as they are not made of cells • Viruses are very small, approximately 100nm across (1nm = 1/1000 000 of a mm) 10nm RNA proteins of the virus coat cross section of the human immunodeficiency virus (HIV)

  10. Viruses reproduce by invading other cells White blood cell (lymphocyte) 1. Virus attaches to cell membrane 2. Virus RNA enters cell 6. New viruses leave the cell 3. DNA copy of the RNA is made 5. Virus cores are made in the cytoplasm 4. Nucleus makes copies of the virus RNA

  11. The main body of a fungus is the mycelium, which is made of hyphae • Fungal cells have cell walls made of substances such as chitin sporangium containing spores mushroom spores produced here Mucor growing on moist bread hyphae of mushroom mycelium hyphae of Mucor mycelium: Secrete digestive enzymes

  12. Now you should be able to: • List the main visible features of monocotyledonous and dicotyledonous flowering plants. • List the main features of viruses, bacteria and fungi, and their adaptations to the environment

  13. Cambridge IGCSE Biology www.clickbiology.com