Question

which different microbes are usefuldifferent to us?

Answer 1

yeast- food like bread, beer and cheese are produced with help of yeast.

Bacillus thuringiensis - this  bacterium(also known as Bt) produces a toxin that is specific to certain types of insects, many of which are pests encountered by gardeners and farmers

antibiotics are made by Bacillus bacteria and fungi, such as Penecillium.

The lactic acid bacteria, such as Lactobacillus and Bifidobacteria, are used in making fermented milk products. Buttermilk, sour cream, cheese, and yogurt are made by letting these bacteria ferment milk to different degrees.

Answer 2

there are many microorganism which help us.

one is lactobacillus which helps inmaking of curd. renin iñ bread...