In what form bacteria may be present in the air?

Why is spore formation in bacteria not considered a form of reproduction?

Define the terms :

(a) Antibiotics

(b) Antitoxins

(c) Serum

(d) Botulism

(e) Pasteurization

Give two examples of each :

(a) Bacterial diseases of cattle

(b) Bacterial diseases in plants

(c) Bacterial diseases in humans

(d) Nitrifying bacteria

(e) Free living nitrogen-fixing bacteria found in soil