Normally, very bad.
60 - 100 million.
A lot of people have experimented with electrolysis, me being one of them.
The word for a person being experimented on is a "subject."
Who really knows... only the people experimenting on them truly know their own reasonings behind it but for the most part we hear about animals being used to test out vaccinations or hair and makeup products things such as these.
There are a number of things that will shorten a animals life span like disease , birth defects , being over weight or under weight causing health problems , being poisoned , kill by predators you name it . If your talking about pets, it all comes down to their health and what their living conditions are like .
They are called "Test Subjects"
Among animal populations, crowding and stress are a growing problem. With human settlement encroaching upon every aspect of animals environments, the animals have nowhere to go and are being forced into stressful living conditions.
Argon
A living organism is like a human being Example/ Animals, Trees, Flowers, Insects, or anything living
Once living plants and animals have become rock through petrification or fossilization.
All living things are being destroyed by humans, even humans. But if you want to know what living things are close to being completely destroyed, just search "list of endangered animals" on google
loosing there homes from the rainforest being cut down