Scientists replicate key evolutionary step in life on earth

[Spang]

More than 500 million years ago, single-celled organisms on Earth's surface began forming multi-cellular clusters that ultimately became plants and animals.

Just how that happened is a question that has eluded evolutionary biologists.

Now scientists have replicated that key step in the laboratory using common Brewer's yeast, a single-celled organism.

The yeast "evolved" into multi-cellular clusters that work together cooperatively, reproduce and adapt to their environment--in essence, they became precursors to life on Earth as it is today.

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