Hey can u please help me anwer this question:

1) Describe the contributions or benefits made by bacteria to the ecosystem:

a) their role in nitrogen fixation (If you could find me a diagram, that would be nice, but don't worry if you cant)

b) Their role as decomposers

c) Their role in sewage treatment

And

2) Describe the role of bacteria in the dairy industry

3) Desrcibe the role of bacteria in biotechnology and genetic engineering. (Diagrams would be nice, but no worries if you can't find them)

NUMBERS 1 AND 3 ARE THE ONES I HAVE TROUBLE WITH! THANKS FOR YOUR HELP

Please refer to this announcement