Question

Suggest a suitable word for each of the following statements. (a) Chemicals added to food to prevent growth of microorganisms. (b) Nitrogen-fixing microorganism present in the root nodules of legumes. (c) Agent which spreads pathogens from one place to another. (d) Chemicals which kill or stop the growth of pathogens

Answer 1

a) Preservatives are the chemicals added to food to prevent growth of microorganisms.
b) Rhizobium is the nitrogen fixing bacteria present in root nodules of legumes.
c) Vector is the agent which spreads pathogens from one place to another.
d) Chemicals which kill or stop the growth of pathogens are called antibiotics.