Question

plz do this question

Answer 1

Answer:

a. preservatives are the chemicals which are added to food to prevent microorganism to grow.

b. Nitrogen fixing bacteria such as azotobacter.

c. Vector are the agents which carry disease from one place to another.

d. pesticides prevent the growth of microorganism and weedicides prevent the growth of unwanted weeds.

I hope my answer will help you.

Answer 2

Preservatives

rhizobia bacteria

carrier

phenol

Hope this satisfies

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Regards

Ashvika Eshwar