Argument: Animals are good research subjects because they are similar to humans
"Why do scientists use animals in research?". The American Physiological Society. Retrieved May 3rd, 2008 - "Animals make good research subjects for a variety of reasons. Animals are biologically similar to humans. They are susceptible to many of the same health problems, and they have short life-cycles so they can easily be studied throughout their whole life-span or across several generations".