1. By: Randy, Nadine, and Sarah
Rats
By: Randy, Nadine, and Sarah

2. Contributions to science
The things that rats have contributed to are:
cancer
Alzheimer's disease
Hypertension/ diabetes
Dental research
Neurology
Infectious diseases
Product safety
Nutrition
Reproductive Biology
Transplants
behavior science

3. characteristics
The reasons for rats being so good for research are because:
Reproductive rate
Small size
And because humans and rats have a lot of the same characteristics in common

4. Benefits
Low cost
Small size
Fast reproductive rate