Question

bacteria are useful as well as harmful to us explain it by giving some example​

Answer 1

Bacteria are useful to is in the following ways

1. They are used to form curd as Lactobacillus

bacteria turn lactose sugar into lactic acid

2. Shells of diatoms are used in toothpaste to give it a gritty texture

3. Certain bacteria like Penicillium are used in production of medicines called antibiotics

They are harmful to us as

1.They cause diseases in humans, animals, plants

2. They cause food spoilage

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Answer 2

Answer:

there are two types of bacteria good bacteria and bad bacteria.good bacteria will help us in digestion and bad bacteria will cause us any disease

Explanation:

good bacteria is present in curd. curd is a probiotic.It contains lactobacillus which belongs to the class of bacteria called lactic acid bacteria. campylo bacter and salmonella are two examples of bad bacteria that spread and develop in your restaurant kitchen.

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