Class 8 Micro Organisms

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2. Micro organism or microbe is a microscopic
organism, which may exist in unicellular
or multicellular form.
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3. Unicellular
microorganisms
• Bacteria
• Protozoa
• Some algae
Multicellular
microorganisms
• Algae
• Fungi
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4. •From ice cold environment to hot springs.
•From deserts to marshy lands.
•Also found in animals including human beings.
• Microorganisms can live alone like amoeba while
bacteria and fungi live in colonies.
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6. FRIENDLY MICROORGANISMS
A) MAKING OF CURD
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7. b) Use of yeast in bakery industry
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8. COMMERCIAL USE OF MICRO ORGANISMS
Yeast undergoes anaerobic respiration
and produces alcohol from sugars.This
process is known as fermentation.
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9. Medicinal use of micro-organisms
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10. VACCINES
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11. INCREASING SOIL FERTILITY
Rhizobium bacteria fixes atmospheric nitrogen and give to plants to increase
its fertility.
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13. HARMFUL MICROBES
COMMUNICABLE DISEASES
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14. DISESASES CAUSED BY MICROBES IN ANIMALS
ANTHRAX IN CATTLE
FOOT AND MOUTH DISEASE
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15. DISEASES CAUSED BY MICROBES IN PLANTS
CITRUS CANKER
RUST OF WHEAT
YELLOW MOSAIC OF
OKRA
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16. FOOD POISONING
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17. FOOD PRESERVATION
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18. NITROGEN CYCLE
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