is it justifiable for animals to be used in research before human experimentation? give evidence to support  

Answer:

Step1- There should be no distinction between humans and animals in the way they are treated. As such, if human experimentation is considered to be immoral and unethical, and strictly prohibited, there is hence no justification to use animals in scientific experiments.

Animal research is frequently considered justifiable based on a consequentialist calculus that invokes cost-benefit or harm-benefit analysis.

Step2- Proponents of animal testing say that it has enabled the development of many life-saving treatments for both humans and animals, that there is no alternative method for researching a complete living organism, and that strict regulations prevent the mistreatment of animals in laboratories.

Step3- The most important reason why animals are used is that it would be wrong to deliberately expose human beings to health risks in order to observe the course of a disease. Animals are needed in research to develop drugs and medical procedures to treat diseases.

Using animals for the purpose of research is one of the extended uses. Various animals like mice, rats, hamsters, rabbits, fishes (examples – zebra fish, trout), birds (mainly chicken), guinea pigs, amphibians (xenopus frogs), primates, dogs, cats etc. are being used in research for a long time.

Examples of animal tests include forcing mice and rats to inhale toxic fumes, force-feeding dogs pesticides, and dripping corrosive chemicals into rabbits' sensitive eyes. Even if a product harms animals, it can still be marketed to consumers.