Medical and scientific research.
no because alot of people have trained gerbils to do things. not alot of people trained rats.
dog is more efficient than rat,dog has a lot of energy than a rat....i hope help this answer
The Brown Rat (Rattus norvegicus) has a larger body than the Black Rat (Rattus rattus)
Usually yes, but it depends on the size of the rat. My dad has seen a rat about the size of a long plank of wood and opossums are smaller than a long plank of wood, usually a few inches bigger than a regular rat. So usually yes, but unless you happen to see a rat bigger than an opossum, that rat has sure lived for a long time.
A rat is a rodent and it is bigger than a mouse. However the largest rodent is a capybara and that is the size of a pig.
In some cases, the squirrel and the rat can be the same weight, but usually the rat is a little bit smaller than the grey squirrel.
Wharf-rat-boys are homeless people. People who live in the street because have no house.
There were about 20,000 people who died in the earthquake of Rat Island, Alaska
Not if it is caught by a cat.
Because politicians communicate with general people
To rescue people from a sinking boat