Question

use ful and harmful bacteria

Answer 1

Answer:

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Explanation:

Examples of helpful bacteria are E. Coli (when used for the digestion process), Streptomyces, and Rhizobium. Examples of harmful bacteria are E. Coli (when contaminating food), Listeriosis, and Salmonella.

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Answer 2

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Lactobacillus: It helps in curdling of milk. Azotobacter: It helps to fix nitrogen for plants. Streptomyces: It is used in antibiotic production such as streptomycin. Methanogens: These are used for the production of methane (biogas) gas from dung.