Economic Importance of Bacteria and Fungi — Chapter Summary
ICSE · Class 9 · Biology
Summary of Economic Importance of Bacteria and Fungi for ICSE Class 9 Biology. Part of the ICSE Class 9 Biology syllabus.
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Overview
Bacteria and fungi are microscopic organisms with both useful and harmful roles. Bacteria help in medicine, agriculture, and industry, while some also spoil food and cause diseases. Fungi are useful in brewing, baking, cheese making, and mushroom cultivation, but some moulds spoil food and some mush
Key Concepts
Bacteria are unicellular prokaryotes without
Bacteria are unicellular prokaryotes without a true nucleus and no chlorophyll. They are not classified as plants in the Five Kingdom classification b
An antibiotic is a chemical substance
An antibiotic is a chemical substance produced by a living organism that can stop the growth of some disease-producing bacteria and fungi. Important e
Penicillin was discovered by Alexander Fleming
Penicillin was discovered by Alexander Fleming from contamination of Penicillium notatum, a mould. Streptomycin was discovered by Selman Waksman from
Serum is blood plasma from
Serum is blood plasma from which fibrinogen has been removed and it contains antitoxins. A vaccine is a preparation consisting of weakened germs or de
Rhizobium lives in root nodules
Rhizobium lives in root nodules of leguminous plants and converts free nitrogen into soluble nitrates. Azotobacter and Clostridium convert free nitrog
Learning Objectives
- Understand the useful roles of bacteria in medicine, agriculture, and industry.
- Recognize the harmful effects of bacteria in food spoilage and disease.
- Learn the basic economic importance of fungi in brewing, baking, cheese processing, and mushroom cultivation.
- Distinguish between useful and harmful microbes through examples.
- Recall key terms, processes, and classifications connected with bacteria and fungi.
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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