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Overview of Microorganisms: Fungi, Protozoa, Bacteria, and Algae

This examination delves into the fascinating world of microorganisms, focusing on four main groups: fungi, protozoa, bacteria, and algae. Fungi, including yeasts and molds, are characterized by their cell walls and ability to form colonies. Protozoa, which lack cell walls, exist in various forms and are classified by their locomotion. Bacteria, the smallest organisms, exhibit diverse shapes and are vital to many ecosystems. Finally, algae, primarily unicellular and photosynthetic, contribute significantly to aquatic environments. Discover the remarkable examples within each group.

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Overview of Microorganisms: Fungi, Protozoa, Bacteria, and Algae

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  1. Examination of Microorganisms

  2. 1 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) 2 3 4

  3. Protozoa • Unicellular • @150μm • No cell walls • Trophozoite and cyst forms • Classified by means of locomotion • Examples: • Paramecium • Amoeba

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

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

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