Because we are mammals. Products and/or drugs tested on other species would not give any pertinent results.
most animals with hair+dolphins
Not all animals, but most mammals do, hence why people have periods (people=mammals)
Yes. Whales are mammals and all mammals defecate, as do most animals.
Most mammals are placental...marsupial mammals and monotremes are not placental.
About 150 million.
rat rabbits humans coyotes squirls
We are mammals, and mammals are one category of animal, so we are both animals and mammals.
Both. Humans are animals in the order Mammalia. All mammals are animals, but not all animals are mammals.
Beagles are the dog most experimented on.
most birds,mammals andreptiles like the terrapin. :)
No, all sea animals are not mammals. Fishes are not mammals, but dolphins are mammals.
Human beings.