![]() ![]() The word ‘they’ in the sentence refers to. “ They are used for scientific and medical purposes.” (Paragraph 1) It is easier to use animals than humansĥ. Based on the text, why do the scientists use animals for their experiments?ī. ".so that they can be good models to understand human body." What does the bold typed word refer to?Ĥ. Scientists learn about the human body by studying. What do researchers and scientists do in laboratories?Ģ. With those similarities, scientists are able to learn much about the human body by studying the animals.ġ. ![]() Animals also carry a number of genes that are identical to human genes. Some animals suffer from the same diseases as humans do. Many chemical functions like human so that they can be good models to understand the human body. Scientists use the animals to investigate biological processes in humans and animals, to study the causes of diseases, to test drugs, vaccines, and surgical techniques, and to evaluate the safety of chemical used in pesticides, cosmetics, and other products. ![]() Mice, rabbits, dogs, and monkeys are a few examples of animals used by researchers and scientists for scientific and medical purposes. ![]()
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