Question

Write a note harmful bacteria & useful bacteria ?

Answer 1

Explanation:

harmful bacteria are those bacteria which causes diseases like (Malaria caused by protozoa ,cough etc. )and useful bacteria are those which doesn't causes diseases and is useful for us for example they are also used in cleaning up of the environment for examples of organic waste bracket (vegetables field remains of plants faces extra)

Answer 2

Explanation:

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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. Pseudomonas spp.

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