Examination of Microorganisms

Fungi• Unicellular organisms• Can be seen forming

colonies• Contain cell walls• Yeasts

– 10 – 100 μm• Molds

– @ 7 μm• Examples

– Penicillium (1)– Aspergillus (2)– Rhizopus (3)– Saccharomyces (Yeast)

1

2

3

4

Protozoa

• Unicellular • @150μm• No cell walls• Trophozoite and cyst

forms• Classified by means of

locomotion• Examples:

– Paramecium– Amoeba

Bacteria

• Unicellular• @ 1-5μm in length• Cell wall• 3 shapes:– Cocci– Bacilli– Spirillum

Algae

• Most unicellular• Photosynthetic• Examples:– Green algae – 5-10 μm– Volvox – 500 μm