Found 2 resources for the concept: Life on Earth 3.8 billion years ago consisted of one-celled organisms similar to present-day bacteria
It takes teamwork: How endosymbiosis changed life on Earth You might be surprised to learn that descendents of an ancient bacterium are living in every cell of your body! Find out how endosymbiosis factored into the evolution of your own cells and learn about a modern example of this process.
Webcast: Fossils, genes, and embryos In lecture three of a four part series, evolutionary biologist David Kingsley examines the original objections to Darwin's theory and shows how modern evidence supports the theory. This lecture is available from Howard Hughes' BioInteractive website.