Unicellular organisms
Have cell wall, plasma membrane and DNA which is not enclosed by a nuclear membrane
Are heterotrophs or autotrophs
Reproduced by binary fission and conjugation
Form spores under unfavourable condition
Examples: Escherichia sp coli., Lactobacillus sp.
Live in aquatic
Have plasma membrane, nucleus and other membranous organelles
Heterotrophs organisms
Use cilia, pseudopodium and flagellum to move around
Reproduce sexually or asexually
Examples: Paramecium sp., Ameoba sp. and Plasmodium sp.
Unicellular organisms, non-fillamentaous and multicellular organisms
Able to carry out photosynthesis as they have chloroplast
The cell wall is made up of glycoprotein
Do not have stems, leaves and roots
Examples: Chlamydomonas sp. and Spirogyra sp.
Unicellular organisms and multicellular organisms
Has no chlorophyll
Saprophytic or parasitic organisms
Secrete extracellular enzymes to breakdown organic matter before they are absorbed
Reproduce by binding or formation of spores
Examples: Yeast, Mucor sp.
Not microorganisms
The smallest size
Can only be seen under an electron microscope
Only consists of DNA or RNA covered by a protein coat
Cannot reproduce outside the host cells
All are parasites
Can be crystallised outside host cells
Examples: Bacteriophage, influenza virus and HIV
Nitrogen cycle:
The roles of microorganisms:
Examples: Cyanobacteria,phtoplankton (algae)
Examples: Saprophytic bacteria,fungi
Examples: Tryconympha sp. (protozoa) and Lactobacillus sp.
Examples: Some bacteria & fungi
Definition of pathogen and vector:
Effects of pathogens on human health:
Virus - Human papillomavirus (HPV)
Bacteria - Salmonella sp.
Protozoa- Plasmodium sp.
Fungi - Tinea sp.
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