Life is said to have began with a single cells that developed 3 billion years ago.
Charles Darwins Theory states that everything in life comes from a single Life Form. (Natural Selection)
Larmarck's theory states that every organism came from worms. (If you cant use it loose it). He believed a species' features would always be passed down to offspring.
A lot of people thought Darwins theory went againstreligion and there was littleevidence.