Question

useful and harmful bacteria
​

Answer 1

Explanation:

At 1st picture useful bacteria names and at 2nd picture harmful bacteria names and covid-19 at harmful bacteria

Answer 2

Useful Bacteria: most of the bacteria acr. t as a decomposer . they breakdown large molecules into simpler molecules or minerals . example : lactobacillus

Harmful Bacteria: this includes disease causing bacteria. they cause various disease like typhoid , cholera, tuberculosis, etc example: vibrio cholera