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Edexcel Biology Chapter 2
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- 1Describe the features of plants.- They're all multicellular
- The main feature is that their cells contain chloroplasts, which carries out photosynthesis - 2Describe the features of animals and name an example of a mammal and an insect.- They're all multicellular organisms
- They feed on other animals or plants
- An example of a mammal is a human
- An example of an insect is a housefly
- They store carbohydrate in their cells as glycogen
- Vertebrates means a group of animals that have a vertebral column (backbone)
- Invertebrates are the opposite - 3Describe the features of fungi and give two examples.- Includes groups such as mushrooms, toadstools and moulds which are multicellular
- Also includes groups such as yeasts, which are unicellular
- Two examples are Mucor and Yeast - 4Describe the features of protoctists and name three examples.- It's a mixed group of organisms that don't fit into other groups
- Most are microscopic single-celled organisms
- Some look like animal cells, others like plant cells
- Most are unicellular, but some species i.e seaweed is multicellular
- Three examples are Amoeba, Chlorella and Plasmodium - 5Describe the features of bacteria and name two examples.- Are single-celled organisms
- Have different shapes i.e spheres, rods and spirals
- Are surrounded by cell wall which protects the bacteria
- The cell all is composed of complex chemicals made of polysaccharides and proteins
- Some bacteria can swim if they have flagellum
- Have quite a simple structure
- Have very important uses in genetic engineering
- Two examples are Lactobacillus bulgaricus and Pneumococcus - 6Describe the features of viruses and name an example.- Are parasites that can only reproduce inside living cells
- Viruses are not made of cells
- They only reproduce
- Are on the border between a living organism and a non-living chemical
- After the virus has reproduced as much as possible inside it's host, the host dies and the particles are released to infect more cells
- The body's immune system destroys the virus
- An example is tobacco mosaic virus, which causes influenza and the HIV virus - 7What is a pathogen?They're organisms which cause disease. It can be a fungi, bacteria, protoctist or a virus.
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- Fichas sobre Edexcel Biology Chapter 2, creado por Anna Bowring el 02/01/2015.
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