what was the first living thing to evolve on earth?

Answer 1

It depends on how loosely you want to define life. The very first thing that could possibly be considered life would be a self-replicating molecule (meaning a molecule that is capable of multiplying itself to make more copies, therefore being able to evolve). One theory is that RNA was the first molecule like this to evolve, in the "primordial soup" of the Earth's oceans. This is known as the "RNA World Hypothesis."

If you want to define life as at least having a cell, then the first organism was most likely a simple, prokaryotic, single-celled organism similar to today's bacteria. However, we have no direct evidence of a specific organism that we can determine was the first.

Answer 2

Blue-Green Algae (really microbial single celled lifeforms).
These microbes paved the way for larger life by photosynthesing and creating oxygen, which was necessary for cellular respiration and for the evolution of larger life.

There are a lot of origin of life information here:

http://en.wikipedia.org/wiki/Origin_of_life

Answer 3

No one knows. I'm going to venture a guess it was a single-cell organism though.

Answer 4

From the looks of her, I would have to say Barbara Bush!

Answer 5

bacteria