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

Give reasons :

(a) Every room in the house should get direct sunlight at least for a short time.

(b) Tinned and sealed food is not always safe to eat.

State the differences between Decay and putrefaction.