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ClickBiology Cambridge IGCSE Biology Extended Level Classification Plants, Bacteria, Viruses and Fungi ClickBiology.

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Presentation on theme: "ClickBiology Cambridge IGCSE Biology Extended Level Classification Plants, Bacteria, Viruses and Fungi ClickBiology."— Presentation transcript:

1 ClickBiology Cambridge IGCSE Biology Extended Level Classification Plants, Bacteria, Viruses and Fungi ClickBiology

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 ClickBiology Flowering plants are classified into two groups: Monocotyledonous plants 1 cotyledon strap like leaves parallel veins flower parts divisible by 3 example: kaffir lily

4 ClickBiology Flowering plants are classified into two groups: Dicotyledonous plants 2 cotyledons broad leaves branching veins flower parts divisible by 4 or 5

5 ClickBiology Comparing monocotyledons and dicotyledons: Featuremonocotyledondicotyledon Number of cotyledons 12 Leaf shape strap likebroad Vein pattern parallelbranching Flower parts divisible by: 34 or 5 Example Kaffir lilyHibiscus

6 ClickBiology Which plant is a monocotyledon and which is a dicotyledon? dicotyledonmonocotyledon

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

9 ClickBiology 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) proteins of the virus coat RNA cross section of the human immunodeficiency virus (HIV) 10nm

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

11 ClickBiology 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 Mucor growing on moist bread hyphae of Mucor mycelium: Secrete digestive enzymes sporangium containing spores mushroom spores produced here hyphae of mushroom mycelium

12 ClickBiology 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 ClickBiology Cambridge IGCSE Biology www.clickbiology.com


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