1 of 31 TEST Bacteria Viruses Fungi Protozoa 1.Which type of microbe causes influenza and AIDS? (1) 2.Which of the four types of microbe are made of cells that contain a nucleus? (1) 3.Which type of microbe is not considered a living organism? (1) 4.Which type of microbe is smaller than all of the others. (1) 5.Bacteria can reproduce in 20 minutes if conditions are ideal. What do you think ideal conditions are like? (1) 6.If bacteria can reproduce in 20 minutes, how many bacteria could be produced from a single cell in 6 hours (1) 7.Name all of the types of microbe that contain a cell wall? 8.If a microbe reproduces using just one parent and no sex cells, is it known as sexual or asexual reproduction? (1) 9.Which type of microbe does is yeast an example of? (1) 10.Which type of microbe reproduces by incorporating its DNA into the host cell?

2 of 31 size: 1/1000 mm – much smaller than animal or plant cells shape: Bacteria can be spherical, rod-shaped or comma-shaped. structure: Single-celled organisms. No nucleus. reproduction: Bacteria reproduce very quickly. One cell splits into to two cells. Two cells split into four. Four become eight and so on. In ideal conditions, one round of reproduction can take 20 minutes. Bacteria e.g. Salmonella and Streptococcus

3 of 31 Bacterium structure

4 of 31 size: 1/1,000,000 mm – smaller than bacteria shape: Viruses have regular and geometric shapes. structure: A virus is a simple organism which does not display ALL the characteristics of living things. They are made up of a protein coating and some genetic material. reproduction: Viruses can only grow and reproduce within other living things. Viruses e.g. flu virus and HIV (the AIDS virus)

5 of 31 Virus structure

6 of 31 size: Some fungi can actually be seen with the naked eye. The fungi we’re concerned with in this topic are microscopic and slightly bigger than bacteria. shape: Fungi come in many different shapes. structure: Fungi have the most complex structures of all the microbes. They have a nucleus. They feed off other living things. Fungi e.g. Penicillium and yeast reproduction: sexual (using sex cells) and asexual (the cell simply splits in two)

7 of 31 Fungi (yeast) structure

8 of 31 size: variable shape: variable structure: Single-celled organisms, although they can form simple colonies. Simple cellular organisation but they do have a nucleus. reproduction: sexual (using sex cells) and asexual (the cell simply splits in two) Protists e.g. Plasmodia, Amoeba

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11 of 31 Group work – instructions – step 1 Each group of 3 has copies of one of four microbes. Have a read through, and highlight any key points. Add labels to the diagram on the reverse. You can use the internet for any additional research. Each group has a piece of sugar paper which you need to produce an information poster that your group will use to ‘ teach ’ other members of the class about your microbe. You must not write sentences. You are limited to 10 words. This is to ensure the info is in your head, and not just on the paper. You need to understand it! YOU HAVE JUST 10 MINUTES FOR THIS ENTIRE SECTION!

12 of 31 Group work – instructions – step 2 2 of your group are students, who will now visit other groups to be taught about the remaining microbes – you can take down notes in the back of your books. The person remaining is the teacher who will explain the key features of their microbe (and what it looks like) to the pupils who visit them. YOU HAVE 10 MINUTES FOR THIS SECTION TOO.

13 of 31 Group work – instructions – step 3 Re-group and teach each other what you have learnt about the other causes. Each person can make their own notes. Try and communicate what you have learnt clearly, try and think about what the key points were. Draw diagrams for each other so you know the structure of each microbe. 5 MINUTES

14 of 31 TEST And now it is time for a…

15 of 31 TEST Bacteria Viruses Fungi Protozoa 1.Which type of microbe causes influenza and AIDS? (1) 2.Which of the four types of microbe are made of cells that contain a nucleus? (1) 3.Which type of microbe is not considered a living organism? (1) 4.Which type of microbe is smaller than all of the others. (1) 5.Bacteria can reproduce in 20 minutes if conditions are ideal. What do you think ideal conditions are like? (1) 6.If bacteria can reproduce in 20 minutes, how many bacteria could be produced from a single cell in 6 hours (1) 7.Name all of the types of microbe that contain a cell wall? 8.If a microbe reproduces using just one parent and no sex cells, is it known as sexual or asexual reproduction? (1) 9.Which type of microbe does is yeast an example of? (1) 10.Which type of microbe reproduces by incorporating its DNA into the host cell?

16 of 31 Bacteria Viruses Fungi Protozoa 1.Which type of microbe causes influenza and AIDS? (1) Virus 2.Which of the four types of microbe are made of cells that contain a nucleus? (1) Protozoa 3.Which type of microbe is not considered a living organism? (1) Virus 4.Which type of microbe is smaller than all of the others. (1) Virus 5.Bacteria can reproduce in 20 minutes if conditions are ideal. What do you think ideal conditions are like? (1) Warm, moist, nutrient rich 6.If bacteria can reproduce in 20 minutes, how many bacteria could be produced from a single cell in 6 hours (1) 262,144 7.Name all of the types of microbe that contain a cell wall? Fungi, Bacteria 8.If a microbe reproduces using just one parent and no sex cells, is it known as sexual or asexual reproduction? (1) Asexual 9.Which type of microbe does is yeast an example of? (1) Fungi 10.Which type of microbe reproduces by incorporating its DNA into the host cell? Virus