Microorganisms can be classified into different types based on their size, shape, reproduction method, nutrition, and habitat. The main types include bacteria, viruses, fungi, protozoa, and algae. Bacteria are unicellular microbes that reproduce through binary fission, while viruses are the smallest and can only replicate inside living host cells. Fungi reproduce both sexually and asexually, and protozoa include both parasitic and saprophytic single-celled organisms. Algae are similar to plants but lack true roots, stems, and leaves.

1. Microorganisms and their effect on living things1.1 Classification of microorganismsManniseh Yakun

2. Microorganisms are small living things that can only be seen through microscopeMicroorganisms can be found anywhere on earthSome microorganism are useful to human, some are harmfulCan be classified intoSizeShapeMethod of reproductionNutritionHabitat

3. Classification of microorganisms

4. Bacteria

5. BacteriaSize0.5 – 10 μm, unicellularShapeDo not have true nucleus, have no nuclear membraneCoccus, bacillus, vibro, spirillum

6. BacteriaMethod of reproductionAsexual reproduction trough binary fissionNutritionParasites, saprophytes or autotrop to obtain nutrient

7. BacteriaHabitatWaterAirSoilPlantsAnimals

8. Viruses

9. VirusesSizeSmallest microorganisms, seen using electron miroscope0.02-0.4 μmShapeDon’t have cytoplasm, nucleus and membrane cellThe body covered with protein capsule

10. VirusesMethod of reproductionDon’t show the living characteristicNo breathing, eating and excreting But go through reproduction process in living cell (host) by duplicating

11. Duplicating process of virus

12. VirusesNutritionParasites causing diseaseNot eat, but using nutrient to duplicates (replication)HabitatLiving cells

13. Fungi

14. FungiSize10-100μmCan seen using magnifying glass or light microscope. ShapePlant that have cell wall and nuclei but don’t have root stem and leaves

15. FungiMethod of reproduction-asexualSpore formationBudding process

16. FungiNutritionSaprophytes – enzymes secretes to digest organic substance and absorbed through their hyphaeParasites - obtain food from living organismHabitatDark and damp

17. Protozoa

18. ProtozoaSize - Unicellular 5-250 μmShapeAquatic organism single cellHave nucleus and cytoplasm covered with cell membraneHave cilia to move

19. ProtozoaMethod of reproductionAmoeba and Paramecium – binary fission (asexual) Paramecium – Conjugation ( Sexual)

20. ProtozoaNutritionSaprophytes – Amoeba and ParameciumParasites – Plasmodium (cause malaria)HabitatAquatic habitatsDamp places, living cells

21. Algae

22. AlgaeSize1- 10000μmSeaweeds can seen with naked eyesShapeLike plant cell, cellulose cell wall, nucleus, cytoplasm, chloroplastDon’t have stem, roots and true leaves

23. AlgaeMethod of reproductionAsexual reproduction by binary fissionSexual reproduction through conjugation as spirogyraNutritionHave chlorophyll undergoes photosynthesis, autotrops, producer in food chainHabitatDamps area and receive sunlight

24. Complete this table….