The Big Bang theory is a cosmological model for the observable universe from the earliest known periods through its subsequent large-scale evolution.
Explanation:
The characteristics of bacteria are as follows:
i) Bacteria cell is prokaryotic cell i.e it does not contain nucleus bounded by nuclear membrane.
ii) Bacteria have cell wall.
ii) They can cause various diseases in plants and animals.
iii) Some are sybiotic bacteria.
Liquid or something gaseous