Answer:
nonhuman animals models
Step-by-step explanation:
A surrogate is defined as a substitute for another person to play a specific role in any given arrangement.
In the case of laboratory research non- human animal models are often used as surrogates for humans to conduct research.
For conducting research a lot of ethical concerns are raised when conducting experiments on human beings and hence, the scientists had to look for alternatives.
The non-human animals have emerged as great alternatives for the humans to conduct research and thanks to the genome sequences that are now known the list of animal models have increased greatly and we are further sure that there are several similarities that these animal models share with humans and thus, the results obtained by conducting research on them are considered reliable.